diff --git a/Source/Common/SyncEvent.h b/Source/Common/SyncEvent.h
index f1aa332dd..3da454f65 100644
--- a/Source/Common/SyncEvent.h
+++ b/Source/Common/SyncEvent.h
@@ -1,4 +1,5 @@
 #pragma once
+#include "stdtypes.h"
 
 class SyncEvent
 {