diff --git a/config.d/library_functions.m4 b/config.d/library_functions.m4
index e53ca3efb..66ff31edc 100644
--- a/config.d/library_functions.m4
+++ b/config.d/library_functions.m4
@@ -7,8 +7,6 @@ AC_FUNC_MEMCMP
 AC_FUNC_MMAP
 AC_TYPE_SIGNAL
 AC_FUNC_VPRINTF
-AC_FUNC_VA_COPY
-AC_FUNC__VA_COPY
 AC_CHECK_FUNCS(
 	access _access connect dlopen execvp fcntl ftime _ftime getaddrinfo \
 	gethostbyname gethostname getnameinfo getpagesize gettimeofday getuid \
@@ -17,6 +15,17 @@ AC_CHECK_FUNCS(
 	_vsnprintf wait
 )
 
+AC_FUNC_VA_COPY
+AC_FUNC__VA_COPY
+AH_VERBATIM([DEFINE_VA_COPY],
+[#ifndef HAVE_VA_COPY
+# ifdef HAVE__VA_COPY
+#  define va_copy(d,s) __va_copy ((d), (s))
+# else
+#  define va_copy(d,s) memcpy (&(d), &(s), sizeof (va_list))
+# endif
+#endif])
+
 DL_LIBS=""
 if test "x$ac_cv_func_dlopen" != "xyes"; then
 	AC_CHECK_LIB(dl, dlopen,
diff --git a/config.d/typedefs_structs_compiler.m4 b/config.d/typedefs_structs_compiler.m4
index a68df83b8..3ba73b7d6 100644
--- a/config.d/typedefs_structs_compiler.m4
+++ b/config.d/typedefs_structs_compiler.m4
@@ -88,8 +88,6 @@ AH_VERBATIM([HAVE___BUILTIN_EXPECT],
 # define __builtin_expect(x,c) x
 #endif])
 
-AC_TYPE_VA_LIST
-
 AC_MSG_CHECKING(for type of fpos_t)
 AC_TRY_COMPILE(
 	[#include <stdio.h>],
diff --git a/libs/util/dstring.c b/libs/util/dstring.c
index 7f8fd190e..4e43a0aae 100644
--- a/libs/util/dstring.c
+++ b/libs/util/dstring.c
@@ -299,23 +299,13 @@ dstring_clearstr (dstring_t *dstr)
 	dstr->str[0] = 0;
 }
 
-#if defined (HAVE_VA_COPY)
-# define VA_COPY(a,b) va_copy (a, b)
-#elif defined (HAVE__VA_COPY)
-# define VA_COPY(a,b) __va_copy (a, b)
-#else
-# define VA_COPY(a,b) memcpy (a, b, sizeof (a))
-#endif
-
 static int
 _dvsprintf (dstring_t *dstr, int offs, const char *fmt, va_list args)
 {
 	int         size;
 
-#ifdef VA_LIST_IS_ARRAY
 	va_list     tmp_args;
-	VA_COPY (tmp_args, args);
-#endif
+	va_copy (tmp_args, args);
 
 	if (!dstr->truesize)
 		dstring_clearstr (dstr); // Make it a string
@@ -324,17 +314,13 @@ _dvsprintf (dstring_t *dstr, int offs, const char *fmt, va_list args)
 							  args)) == -1) {
 		dstr->size = (dstr->truesize & ~1023) + 1024;
 		dstring_adjust (dstr);
-#ifdef VA_LIST_IS_ARRAY
-		VA_COPY (args, tmp_args);
-#endif
+		va_copy (args, tmp_args);
 	}
 	dstr->size = size + offs + 2;
 	// "Proper" implementations return the required size
 	if (dstr->size > dstr->truesize) {
 		dstring_adjust (dstr);
-#ifdef VA_LIST_IS_ARRAY
-		VA_COPY (args, tmp_args);
-#endif
+		va_copy (args, tmp_args);
 		vsnprintf (dstr->str + offs, dstr->truesize - offs - 1, fmt, args);
 	}
 	dstr->size = size + offs + 1;
diff --git a/libs/util/sys.c b/libs/util/sys.c
index d6e9af789..4e2e111e2 100644
--- a/libs/util/sys.c
+++ b/libs/util/sys.c
@@ -493,21 +493,11 @@ Sys_Quit (void)
 	exit (0);
 }
 
-#if defined (HAVE_VA_COPY)
-# define VA_COPY(a,b) va_copy (a, b)
-#elif defined (HAVE__VA_COPY)
-# define VA_COPY(a,b) __va_copy (a, b)
-#else
-# define VA_COPY(a,b) memcpy (a, b, sizeof (a))
-#endif
-
 VISIBLE void
 Sys_Error (const char *error, ...)
 {
 	va_list     args;
-#ifdef VA_LIST_IS_ARRAY
 	va_list     tmp_args;
-#endif
 	static int  in_sys_error = 0;
 
 	if (in_sys_error) {
@@ -521,9 +511,7 @@ Sys_Error (const char *error, ...)
 	in_sys_error = 1;
 
 	va_start (args, error);
-#ifdef VA_LIST_IS_ARRAY
-	VA_COPY (tmp_args, args);
-#endif
+	va_copy (tmp_args, args);
 	sys_err_printf_function (error, args);
 	va_end (args);
 
@@ -532,9 +520,7 @@ Sys_Error (const char *error, ...)
 	if (sys_err_printf_function != Sys_ErrPrintf) {
 		// print the message again using the default error printer to increase
 		// the chances of the error being seen.
-#ifdef VA_LIST_IS_ARRAY
-		VA_COPY (args, tmp_args);
-#endif
+		va_copy (args, tmp_args);
 		Sys_ErrPrintf (error, args);
 	}
 
diff --git a/tools/qflmp/lmp.c b/tools/qflmp/lmp.c
index f0f41c256..b8021166c 100644
--- a/tools/qflmp/lmp.c
+++ b/tools/qflmp/lmp.c
@@ -31,6 +31,9 @@
 	width * height bytes
 	no attached palette
 */
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
 
 #ifndef _GNU_SOURCE
 # define _GNU_SOURCE