$NetBSD: patch-ah,v 1.2 2004/11/05 11:51:35 adam Exp $

--- src/properties.c.orig	2004-10-27 17:41:34.000000000 +1000
+++ src/properties.c	2004-10-27 17:42:09.000000000 +1000
@@ -81,8 +81,8 @@
 
     class_hint = XAllocClassHint();
     if (XGetClassHint(dpy,window,class_hint) == 0) {
-        *wm_class = NULL;
-        *wm_instance = NULL;
+        *wm_class = strdup("default");
+        *wm_instance = strdup("default");
         XFree(class_hint);
         return False;
     }