diff --git a/polymer/eduke32/build/src/engine.c b/polymer/eduke32/build/src/engine.c
index b61b50f1a..a7cf565bd 100644
--- a/polymer/eduke32/build/src/engine.c
+++ b/polymer/eduke32/build/src/engine.c
@@ -166,6 +166,9 @@ static int16_t *dotp1[MAXYDIM], *dotp2[MAXYDIM];
 static int8_t tempbuf[MAXWALLS];
 
 // referenced from asm
+#if !defined(NOASM) && defined __cplusplus
+extern "C" {
+#endif
 int32_t ebpbak, espbak;
 int32_t reciptable[2048], fpuasm;
 intptr_t asm1, asm2, asm3, asm4, palookupoffse[4];
@@ -174,6 +177,9 @@ int32_t vince[4];
 intptr_t bufplce[4];
 int32_t globaltilesizy;
 int32_t globalx1, globaly2, globalx3, globaly3;
+#if !defined(NOASM) && defined __cplusplus
+};
+#endif
 
 static intptr_t slopalookup[16384];    // was 2048
 #if defined(USE_OPENGL)
diff --git a/polymer/eduke32/build/src/engine_priv.h b/polymer/eduke32/build/src/engine_priv.h
index 92bd2d106..0e9c3934d 100644
--- a/polymer/eduke32/build/src/engine_priv.h
+++ b/polymer/eduke32/build/src/engine_priv.h
@@ -18,12 +18,12 @@
 # define YAX_MAXDRAWS 8
 #endif
 
-#ifdef EXTERNC
+#if !defined(NOASM) && defined __cplusplus
 extern "C" {
 #endif
     extern intptr_t asm1, asm2, asm3, asm4;
     extern int32_t globalx1, globaly2;
-#ifdef EXTERNC
+#if !defined(NOASM) && defined __cplusplus
 };
 #endif
 
diff --git a/polymer/eduke32/platform/Windows/lib/32/libcompat-to-msvc.a b/polymer/eduke32/platform/Windows/lib/32/libcompat-to-msvc.a
index 83d55661c..b585978fb 100644
Binary files a/polymer/eduke32/platform/Windows/lib/32/libcompat-to-msvc.a and b/polymer/eduke32/platform/Windows/lib/32/libcompat-to-msvc.a differ
diff --git a/polymer/eduke32/platform/Windows/lib/64/libcompat-to-msvc.a b/polymer/eduke32/platform/Windows/lib/64/libcompat-to-msvc.a
index 63b073110..477b7ddd0 100644
Binary files a/polymer/eduke32/platform/Windows/lib/64/libcompat-to-msvc.a and b/polymer/eduke32/platform/Windows/lib/64/libcompat-to-msvc.a differ
diff --git a/polymer/eduke32/platform/Windows/src/compat-from-mingw-w64/Makefile b/polymer/eduke32/platform/Windows/src/compat-from-mingw-w64/Makefile
index bd3bf270a..d477f1b2d 100644
--- a/polymer/eduke32/platform/Windows/src/compat-from-mingw-w64/Makefile
+++ b/polymer/eduke32/platform/Windows/src/compat-from-mingw-w64/Makefile
@@ -2,14 +2,13 @@
 o=o
 
 NAME:=libcompat-from-mingw-w64
-OBJS:=vsnprintf.$o
 
 
 %.$o: %.c
 	gcc -Wall -Wextra -O3 -c $< -o $@
 
-$(NAME).a: $(OBJS)
-	ar r $@ $<
+$(NAME).a: vsnprintf.$o
+	ar rc $@ $^
 	ranlib $@
 
 all : $(NAME).a
diff --git a/polymer/eduke32/platform/Windows/src/compat-to-msvc/Makefile b/polymer/eduke32/platform/Windows/src/compat-to-msvc/Makefile
index 0321d00dd..b5023fdd5 100644
--- a/polymer/eduke32/platform/Windows/src/compat-to-msvc/Makefile
+++ b/polymer/eduke32/platform/Windows/src/compat-to-msvc/Makefile
@@ -2,14 +2,13 @@
 o=o
 
 NAME:=libcompat-to-msvc
-OBJS:=io_math.$o
 
 
 %.$o: %.c
 	gcc -Wall -Wextra -O3 -c $< -o $@
 
-$(NAME).a: $(OBJS)
-	ar r $@ $<
+$(NAME).a: dll_math.$o io_math.$o
+	ar rc $@ $^
 	ranlib $@
 
 all : $(NAME).a
diff --git a/polymer/eduke32/platform/Windows/src/compat-to-msvc/dll_math.c b/polymer/eduke32/platform/Windows/src/compat-to-msvc/dll_math.c
new file mode 100644
index 000000000..51114f893
--- /dev/null
+++ b/polymer/eduke32/platform/Windows/src/compat-to-msvc/dll_math.c
@@ -0,0 +1,554 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _LIBKERN_QUAD_H_
+#define	_LIBKERN_QUAD_H_
+
+/*
+ * Quad arithmetic.
+ *
+ * This library makes the following assumptions:
+ *
+ *  - The type long long (aka quad_t) exists.
+ *
+ *  - A quad variable is exactly twice as long as `long'.
+ *
+ *  - The machine's arithmetic is two's complement.
+ *
+ * This library can provide 128-bit arithmetic on a machine with 128-bit
+ * quads and 64-bit longs, for instance, or 96-bit arithmetic on machines
+ * with 48-bit longs.
+ */
+/*
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <sys/limits.h>
+#include <sys/syslimits.h>
+*/
+
+#include <limits.h>
+typedef long long quad_t;
+typedef unsigned long long u_quad_t;
+typedef unsigned long u_long;
+#ifndef CHAR_BIT
+# define CHAR_BIT __CHAR_BIT__
+#endif
+
+/*
+ * Define the order of 32-bit words in 64-bit words.
+ * For little endian only.
+ */
+#define _QUAD_HIGHWORD 1
+#define _QUAD_LOWWORD 0
+
+/*
+ * Depending on the desired operation, we view a `long long' (aka quad_t) in
+ * one or more of the following formats.
+ */
+union uu {
+	quad_t	q;		/* as a (signed) quad */
+	quad_t	uq;		/* as an unsigned quad */
+	long	sl[2];		/* as two signed longs */
+	u_long	ul[2];		/* as two unsigned longs */
+};
+
+/*
+ * Define high and low longwords.
+ */
+#define	H		_QUAD_HIGHWORD
+#define	L		_QUAD_LOWWORD
+
+/*
+ * Total number of bits in a quad_t and in the pieces that make it up.
+ * These are used for shifting, and also below for halfword extraction
+ * and assembly.
+ */
+#define	QUAD_BITS	(sizeof(quad_t) * CHAR_BIT)
+#define	LONG_BITS	(sizeof(long) * CHAR_BIT)
+#define	HALF_BITS	(sizeof(long) * CHAR_BIT / 2)
+
+/*
+ * Extract high and low shortwords from longword, and move low shortword of
+ * longword to upper half of long, i.e., produce the upper longword of
+ * ((quad_t)(x) << (number_of_bits_in_long/2)).  (`x' must actually be u_long.)
+ *
+ * These are used in the multiply code, to split a longword into upper
+ * and lower halves, and to reassemble a product as a quad_t, shifted left
+ * (sizeof(long)*CHAR_BIT/2).
+ */
+#define	HHALF(x)	((x) >> HALF_BITS)
+#define	LHALF(x)	((x) & ((1 << HALF_BITS) - 1))
+#define	LHUP(x)		((x) << HALF_BITS)
+
+typedef unsigned int	qshift_t;
+
+quad_t		__ashldi3(quad_t, qshift_t);
+quad_t		__ashrdi3(quad_t, qshift_t);
+int		__cmpdi2(quad_t a, quad_t b);
+quad_t		__divdi3(quad_t a, quad_t b);
+quad_t		__lshrdi3(quad_t, qshift_t);
+quad_t		__moddi3(quad_t a, quad_t b);
+u_quad_t	__qdivrem(u_quad_t u, u_quad_t v, u_quad_t *rem);
+u_quad_t	__udivdi3(u_quad_t a, u_quad_t b);
+u_quad_t	__umoddi3(u_quad_t a, u_quad_t b);
+int		__ucmpdi2(u_quad_t a, u_quad_t b);
+
+#endif /* !_LIBKERN_QUAD_H_ */
+
+#if defined (_X86_) && !defined (__x86_64__)
+/*
+ * Shift a (signed) quad value left (arithmetic shift left).
+ * This is the same as logical shift left!
+ */
+quad_t
+__ashldi3(a, shift)
+	quad_t a;
+	qshift_t shift;
+{
+	union uu aa;
+
+	aa.q = a;
+	if (shift >= LONG_BITS) {
+		aa.ul[H] = shift >= QUAD_BITS ? 0 :
+		    aa.ul[L] << (shift - LONG_BITS);
+		aa.ul[L] = 0;
+	} else if (shift > 0) {
+		aa.ul[H] = (aa.ul[H] << shift) |
+		    (aa.ul[L] >> (LONG_BITS - shift));
+		aa.ul[L] <<= shift;
+	}
+	return (aa.q);
+}
+
+/*
+ * Shift a (signed) quad value right (arithmetic shift right).
+ */
+quad_t
+__ashrdi3(a, shift)
+	quad_t a;
+	qshift_t shift;
+{
+	union uu aa;
+
+	aa.q = a;
+	if (shift >= LONG_BITS) {
+		long s;
+
+		/*
+		 * Smear bits rightward using the machine's right-shift
+		 * method, whether that is sign extension or zero fill,
+		 * to get the `sign word' s.  Note that shifting by
+		 * LONG_BITS is undefined, so we shift (LONG_BITS-1),
+		 * then 1 more, to get our answer.
+		 */
+		s = (aa.sl[H] >> (LONG_BITS - 1)) >> 1;
+		aa.ul[L] = shift >= QUAD_BITS ? s :
+		    aa.sl[H] >> (shift - LONG_BITS);
+		aa.ul[H] = s;
+	} else if (shift > 0) {
+		aa.ul[L] = (aa.ul[L] >> shift) |
+		    (aa.ul[H] << (LONG_BITS - shift));
+		aa.sl[H] >>= shift;
+	}
+	return (aa.q);
+}
+
+/*
+ * Return 0, 1, or 2 as a <, =, > b respectively.
+ * Both a and b are considered signed---which means only the high word is
+ * signed.
+ */
+int
+__cmpdi2(a, b)
+	quad_t a, b;
+{
+	union uu aa, bb;
+
+	aa.q = a;
+	bb.q = b;
+	return (aa.sl[H] < bb.sl[H] ? 0 : aa.sl[H] > bb.sl[H] ? 2 :
+	    aa.ul[L] < bb.ul[L] ? 0 : aa.ul[L] > bb.ul[L] ? 2 : 1);
+}
+
+/*
+ * Divide two signed quads.
+ * ??? if -1/2 should produce -1 on this machine, this code is wrong
+ */
+quad_t
+__divdi3(a, b)
+	quad_t a, b;
+{
+	u_quad_t ua, ub, uq;
+	int neg;
+
+	if (a < 0)
+		ua = -(u_quad_t)a, neg = 1;
+	else
+		ua = a, neg = 0;
+	if (b < 0)
+		ub = -(u_quad_t)b, neg ^= 1;
+	else
+		ub = b;
+	uq = __qdivrem(ua, ub, (u_quad_t *)0);
+	return (neg ? -uq : uq);
+}
+
+/*
+ * Shift an (unsigned) quad value right (logical shift right).
+ */
+quad_t
+__lshrdi3(a, shift)
+	quad_t a;
+	qshift_t shift;
+{
+	union uu aa;
+
+	aa.q = a;
+	if (shift >= LONG_BITS) {
+		aa.ul[L] = shift >= QUAD_BITS ? 0 :
+		    aa.ul[H] >> (shift - LONG_BITS);
+		aa.ul[H] = 0;
+	} else if (shift > 0) {
+		aa.ul[L] = (aa.ul[L] >> shift) |
+		    (aa.ul[H] << (LONG_BITS - shift));
+		aa.ul[H] >>= shift;
+	}
+	return (aa.q);
+}
+
+/*
+ * Return remainder after dividing two signed quads.
+ *
+ * XXX
+ * If -1/2 should produce -1 on this machine, this code is wrong.
+ */
+quad_t
+__moddi3(a, b)
+	quad_t a, b;
+{
+	u_quad_t ua, ub, ur;
+	int neg;
+
+	if (a < 0)
+		ua = -(u_quad_t)a, neg = 1;
+	else
+		ua = a, neg = 0;
+	if (b < 0)
+		ub = -(u_quad_t)b;
+	else
+		ub = b;
+	(void)__qdivrem(ua, ub, &ur);
+	return (neg ? -ur : ur);
+}
+
+
+/*
+ * Multiprecision divide.  This algorithm is from Knuth vol. 2 (2nd ed),
+ * section 4.3.1, pp. 257--259.
+ */
+
+#define	B	(1 << HALF_BITS)	/* digit base */
+
+/* Combine two `digits' to make a single two-digit number. */
+#define	COMBINE(a, b) (((u_long)(a) << HALF_BITS) | (b))
+
+/* select a type for digits in base B: use unsigned short if they fit */
+#if ULONG_MAX == 0xffffffff && USHRT_MAX >= 0xffff
+typedef unsigned short digit;
+#else
+typedef u_long digit;
+#endif
+
+/*
+ * Shift p[0]..p[len] left `sh' bits, ignoring any bits that
+ * `fall out' the left (there never will be any such anyway).
+ * We may assume len >= 0.  NOTE THAT THIS WRITES len+1 DIGITS.
+ */
+static void
+__shl(register digit *p, register int len, register int sh)
+{
+	register int i;
+
+	for (i = 0; i < len; i++)
+		p[i] = LHALF(p[i] << sh) | (p[i + 1] >> (HALF_BITS - sh));
+	p[i] = LHALF(p[i] << sh);
+}
+
+/*
+ * __qdivrem(u, v, rem) returns u/v and, optionally, sets *rem to u%v.
+ *
+ * We do this in base 2-sup-HALF_BITS, so that all intermediate products
+ * fit within u_long.  As a consequence, the maximum length dividend and
+ * divisor are 4 `digits' in this base (they are shorter if they have
+ * leading zeros).
+ */
+u_quad_t
+__qdivrem(uq, vq, arq)
+	u_quad_t uq, vq, *arq;
+{
+	union uu tmp;
+	digit *u, *v, *q;
+	register digit v1, v2;
+	u_long qhat, rhat, t;
+	int m, n, d, j, i;
+	digit uspace[5], vspace[5], qspace[5];
+
+	/*
+	 * Take care of special cases: divide by zero, and u < v.
+	 */
+	if (vq == 0) {
+		/* divide by zero. */
+		static volatile const unsigned int zero = 0;
+
+		tmp.ul[H] = tmp.ul[L] = 1 / zero;
+		if (arq)
+			*arq = uq;
+		return (tmp.q);
+	}
+	if (uq < vq) {
+		if (arq)
+			*arq = uq;
+		return (0);
+	}
+	u = &uspace[0];
+	v = &vspace[0];
+	q = &qspace[0];
+
+	/*
+	 * Break dividend and divisor into digits in base B, then
+	 * count leading zeros to determine m and n.  When done, we
+	 * will have:
+	 *	u = (u[1]u[2]...u[m+n]) sub B
+	 *	v = (v[1]v[2]...v[n]) sub B
+	 *	v[1] != 0
+	 *	1 < n <= 4 (if n = 1, we use a different division algorithm)
+	 *	m >= 0 (otherwise u < v, which we already checked)
+	 *	m + n = 4
+	 * and thus
+	 *	m = 4 - n <= 2
+	 */
+	tmp.uq = uq;
+	u[0] = 0;
+	u[1] = HHALF(tmp.ul[H]);
+	u[2] = LHALF(tmp.ul[H]);
+	u[3] = HHALF(tmp.ul[L]);
+	u[4] = LHALF(tmp.ul[L]);
+	tmp.uq = vq;
+	v[1] = HHALF(tmp.ul[H]);
+	v[2] = LHALF(tmp.ul[H]);
+	v[3] = HHALF(tmp.ul[L]);
+	v[4] = LHALF(tmp.ul[L]);
+	for (n = 4; v[1] == 0; v++) {
+		if (--n == 1) {
+			u_long rbj;	/* r*B+u[j] (not root boy jim) */
+			digit q1, q2, q3, q4;
+
+			/*
+			 * Change of plan, per exercise 16.
+			 *	r = 0;
+			 *	for j = 1..4:
+			 *		q[j] = floor((r*B + u[j]) / v),
+			 *		r = (r*B + u[j]) % v;
+			 * We unroll this completely here.
+			 */
+			t = v[2];	/* nonzero, by definition */
+			q1 = u[1] / t;
+			rbj = COMBINE(u[1] % t, u[2]);
+			q2 = rbj / t;
+			rbj = COMBINE(rbj % t, u[3]);
+			q3 = rbj / t;
+			rbj = COMBINE(rbj % t, u[4]);
+			q4 = rbj / t;
+			if (arq)
+				*arq = rbj % t;
+			tmp.ul[H] = COMBINE(q1, q2);
+			tmp.ul[L] = COMBINE(q3, q4);
+			return (tmp.q);
+		}
+	}
+
+	/*
+	 * By adjusting q once we determine m, we can guarantee that
+	 * there is a complete four-digit quotient at &qspace[1] when
+	 * we finally stop.
+	 */
+	for (m = 4 - n; u[1] == 0; u++)
+		m--;
+	for (i = 4 - m; --i >= 0;)
+		q[i] = 0;
+	q += 4 - m;
+
+	/*
+	 * Here we run Program D, translated from MIX to C and acquiring
+	 * a few minor changes.
+	 *
+	 * D1: choose multiplier 1 << d to ensure v[1] >= B/2.
+	 */
+	d = 0;
+	for (t = v[1]; t < B / 2; t <<= 1)
+		d++;
+	if (d > 0) {
+		__shl(&u[0], m + n, d);		/* u <<= d */
+		__shl(&v[1], n - 1, d);		/* v <<= d */
+	}
+	/*
+	 * D2: j = 0.
+	 */
+	j = 0;
+	v1 = v[1];	/* for D3 -- note that v[1..n] are constant */
+	v2 = v[2];	/* for D3 */
+	do {
+		register digit uj0, uj1, uj2;
+
+		/*
+		 * D3: Calculate qhat (\^q, in TeX notation).
+		 * Let qhat = min((u[j]*B + u[j+1])/v[1], B-1), and
+		 * let rhat = (u[j]*B + u[j+1]) mod v[1].
+		 * While rhat < B and v[2]*qhat > rhat*B+u[j+2],
+		 * decrement qhat and increase rhat correspondingly.
+		 * Note that if rhat >= B, v[2]*qhat < rhat*B.
+		 */
+		uj0 = u[j + 0];	/* for D3 only -- note that u[j+...] change */
+		uj1 = u[j + 1];	/* for D3 only */
+		uj2 = u[j + 2];	/* for D3 only */
+		if (uj0 == v1) {
+			qhat = B;
+			rhat = uj1;
+			goto qhat_too_big;
+		} else {
+			u_long nn = COMBINE(uj0, uj1);
+			qhat = nn / v1;
+			rhat = nn % v1;
+		}
+		while (v2 * qhat > COMBINE(rhat, uj2)) {
+	qhat_too_big:
+			qhat--;
+			if ((rhat += v1) >= B)
+				break;
+		}
+		/*
+		 * D4: Multiply and subtract.
+		 * The variable `t' holds any borrows across the loop.
+		 * We split this up so that we do not require v[0] = 0,
+		 * and to eliminate a final special case.
+		 */
+		for (t = 0, i = n; i > 0; i--) {
+			t = u[i + j] - v[i] * qhat - t;
+			u[i + j] = LHALF(t);
+			t = (B - HHALF(t)) & (B - 1);
+		}
+		t = u[j] - t;
+		u[j] = LHALF(t);
+		/*
+		 * D5: test remainder.
+		 * There is a borrow if and only if HHALF(t) is nonzero;
+		 * in that (rare) case, qhat was too large (by exactly 1).
+		 * Fix it by adding v[1..n] to u[j..j+n].
+		 */
+		if (HHALF(t)) {
+			qhat--;
+			for (t = 0, i = n; i > 0; i--) { /* D6: add back. */
+				t += u[i + j] + v[i];
+				u[i + j] = LHALF(t);
+				t = HHALF(t);
+			}
+			u[j] = LHALF(u[j] + t);
+		}
+		q[j] = qhat;
+	} while (++j <= m);		/* D7: loop on j. */
+
+	/*
+	 * If caller wants the remainder, we have to calculate it as
+	 * u[m..m+n] >> d (this is at most n digits and thus fits in
+	 * u[m+1..m+n], but we may need more source digits).
+	 */
+	if (arq) {
+		if (d) {
+			for (i = m + n; i > m; --i)
+				u[i] = (u[i] >> d) |
+				    LHALF(u[i - 1] << (HALF_BITS - d));
+			u[i] = 0;
+		}
+		tmp.ul[H] = COMBINE(uspace[1], uspace[2]);
+		tmp.ul[L] = COMBINE(uspace[3], uspace[4]);
+		*arq = tmp.q;
+	}
+
+	tmp.ul[H] = COMBINE(qspace[1], qspace[2]);
+	tmp.ul[L] = COMBINE(qspace[3], qspace[4]);
+	return (tmp.q);
+}
+
+/*
+ * Return 0, 1, or 2 as a <, =, > b respectively.
+ * Neither a nor b are considered signed.
+ */
+int
+__ucmpdi2(a, b)
+	u_quad_t a, b;
+{
+	union uu aa, bb;
+
+	aa.uq = a;
+	bb.uq = b;
+	return (aa.ul[H] < bb.ul[H] ? 0 : aa.ul[H] > bb.ul[H] ? 2 :
+	    aa.ul[L] < bb.ul[L] ? 0 : aa.ul[L] > bb.ul[L] ? 2 : 1);
+}
+
+/*
+ * Divide two unsigned quads.
+ */
+u_quad_t
+__udivdi3(a, b)
+	u_quad_t a, b;
+{
+
+	return (__qdivrem(a, b, (u_quad_t *)0));
+}
+
+/*
+ * Return remainder after dividing two unsigned quads.
+ */
+u_quad_t
+__umoddi3(a, b)
+	u_quad_t a, b;
+{
+	u_quad_t r;
+
+	(void)__qdivrem(a, b, &r);
+	return (r);
+}
+#else
+static int __attribute__((unused)) dummy;
+#endif /* defined (_X86_) && !defined (__x86_64__) */
+
diff --git a/polymer/eduke32/platform/Windows/src/compat-to-msvc/io_math.c b/polymer/eduke32/platform/Windows/src/compat-to-msvc/io_math.c
index cfc0ed611..201f8da21 100644
--- a/polymer/eduke32/platform/Windows/src/compat-to-msvc/io_math.c
+++ b/polymer/eduke32/platform/Windows/src/compat-to-msvc/io_math.c
@@ -37,7 +37,3 @@ long lround(double d)
 {
     return (long)(d > 0 ? d + 0.5 : ceil(d - 0.5));
 }
-long lroundf(float d)
-{
-    return (long)(d > 0 ? d + 0.5 : ceilf(d - 0.5));
-}