diff --git a/polymer/eduke32/build/include/compat.h b/polymer/eduke32/build/include/compat.h
index 945c309ed..9b0c3b544 100644
--- a/polymer/eduke32/build/include/compat.h
+++ b/polymer/eduke32/build/include/compat.h
@@ -431,6 +431,13 @@ int32_t		Bclosedir(BDIR *dir);
   typedef int32_t bssize_t;
 #endif
 
+static inline char *Bstrncpyz(char *dst, const char *src, bsize_t n)
+{
+    strncpy(dst, src, n);
+    dst[n-1] = 0;
+    return dst;
+}
+
 #if RAND_MAX == 32767
 static inline uint16_t system_15bit_rand(void) { return (uint16_t)rand(); }
 #else  // RAND_MAX > 32767, assumed to be of the form 2^k - 1