diff --git a/dlls/activeds/activeds_main.c b/dlls/activeds/activeds_main.c
index c249cf1797c..15a329e99c4 100644
--- a/dlls/activeds/activeds_main.c
+++ b/dlls/activeds/activeds_main.c
@@ -24,7 +24,6 @@
 #include <stdarg.h>
 
 #define COBJMACROS
-#define NONAMELESSUNION
 
 #include "windef.h"
 #include "winbase.h"