diff --git a/include/WinStd/WinHTTP.h b/include/WinStd/WinHTTP.h
index b14d33b9..8d1a8a8b 100644
--- a/include/WinStd/WinHTTP.h
+++ b/include/WinStd/WinHTTP.h
@@ -9,6 +9,7 @@
 #pragma once
 
 #include "Common.h"
+#include "Win.h"
 #include <winhttp.h>
 #include <string>