diff --git a/scripts/patch_xp.c b/scripts/patch_xp.c
index 9464d6e73..c0db1ccb5 100644
--- a/scripts/patch_xp.c
+++ b/scripts/patch_xp.c
@@ -1,5 +1,7 @@
 // patch GetTickCount64 for running on Windows XP
 #include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
 
 int main(int argc, char** argv) {
   unsigned char* buf;