diff --git a/mingw-w64-headers/include/unknwn.h b/mingw-w64-headers/include/unknwn.h
index bccd9e6..b333f03 100644
--- a/mingw-w64-headers/include/unknwn.h
+++ b/mingw-w64-headers/include/unknwn.h
@@ -15,6 +15,10 @@
 #ifndef __WIDL_UNKNWN_H
 #define __WIDL_UNKNWN_H
 
+#pragma push_macro("interface")
+#undef interface
+#define interface struct
+
 /* Forward declarations */
 
 #ifndef __IUnknown_FWD_DEFINED__
@@ -402,4 +406,6 @@
 }
 #endif
 
+#pragma pop_macro("interface")
+
 #endif /* __WIDL_UNKNWN_H */