diff --git a/dlls/dwmapi/dwmapi_main.c b/dlls/dwmapi/dwmapi_main.c
index d5fb03ff331..08373b9b67b 100644
--- a/dlls/dwmapi/dwmapi_main.c
+++ b/dlls/dwmapi/dwmapi_main.c
@@ -22,8 +22,6 @@
 #include "config.h"
 #include <stdarg.h>
 
-#define NONAMELESSUNION
-#define NONAMELESSSTRUCT
 #define COBJMACROS
 #include "windef.h"
 #include "winbase.h"