diff --git a/core/typedefs.h b/core/typedefs.h
index 37186cab4d7..f96fc40cea6 100644
--- a/core/typedefs.h
+++ b/core/typedefs.h
@@ -93,6 +93,7 @@ T *_nullptr() {
 #undef CLAMP // override standard definition
 #undef Error
 #undef OK
+#undef CONNECT_DEFERRED // override from Windows SDK, clashes with Object enum
 #endif
 
 #include "int_types.h"