diff --git a/Source/Common/md5.h b/Source/Common/md5.h
index 0d8fd6cc6..543a131ce 100644
--- a/Source/Common/md5.h
+++ b/Source/Common/md5.h
@@ -43,6 +43,8 @@ documentation and/or software.
 
 #include <string>
 #include <functional>
+
+#include <stdio.h>
 #include "path.h"
 
 struct MD5Digest