diff --git a/libvo/aclib.c b/libvo/aclib.c
index bd089f6e34..5959b7326a 100644
--- a/libvo/aclib.c
+++ b/libvo/aclib.c
@@ -148,6 +148,7 @@ void * fast_memcpy(void * to, const void * from, size_t len)
 	return to;
 }
 
+#undef	mem2agpcpy
 void * mem2agpcpy(void * to, const void * from, size_t len)
 {
 #ifdef RUNTIME_CPUDETECT