diff --git a/engine/qclib/qcc_pr_lex.c b/engine/qclib/qcc_pr_lex.c
index 1f84fdd48..dd4d321fe 100644
--- a/engine/qclib/qcc_pr_lex.c
+++ b/engine/qclib/qcc_pr_lex.c
@@ -6,6 +6,17 @@
 #endif
 #include "time.h"
 
+// Win64 + SDL = undfined reference to vsnprintf
+#ifdef _WIN64
+#ifdef SDL_MAJOR_VERSION
+		//msvc crap
+		#define snprintf linuxlike_snprintf
+		int VARGS linuxlike_snprintf(char *buffer, int size, const char *format, ...) LIKEPRINTF(3);
+		#define vsnprintf linuxlike_vsnprintf
+		int VARGS linuxlike_vsnprintf(char *buffer, int size, const char *format, va_list argptr);
+#endif
+#endif
+
 #define MEMBERFIELDNAME "__m%s"
 
 #define STRCMP(s1,s2) (((*s1)!=(*s2)) || strcmp(s1+1,s2+1))	//saves about 2-6 out of 120 - expansion of idea from fastqcc