diff --git a/cfg/windows.cfg b/cfg/windows.cfg
index 27e4cb0c9..cd8fdb984 100644
--- a/cfg/windows.cfg
+++ b/cfg/windows.cfg
@@ -3659,6 +3659,7 @@ HFONT CreateFont(
     <noreturn>false</noreturn>
     <arg nr="1" direction="in">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
   </function>
   <!-- void _swab(char *src, char *dest, int n);-->