diff --git a/project/revision.h b/project/revision.h
index f03f656..081bca1 100644
--- a/project/revision.h
+++ b/project/revision.h
@@ -1,3 +1,6 @@
+#include <stdio.h>
+#include <string.h>
+
 #include "cparser_version.h"
 
 #ifndef CPARSER_THREAD