diff -r a98f0e8ea6cb dwm.c
--- a/dwm.c	Sat Feb 14 11:21:24 2009 +0000
+++ b/dwm.c	Mon Feb 16 09:10:02 2009 -0500
@@ -257,21 +257,22 @@
 
 void
 applyrules(Client *c) {
-	unsigned int i;
+	unsigned int i, xh=0;
 	Rule *r;
 	XClassHint ch = { 0 };
 
 	/* rule matching */
-	if(XGetClassHint(dpy, c->win, &ch)) {
-		for(i = 0; i < LENGTH(rules); i++) {
-			r = &rules[i];
-			if((!r->title || strstr(c->name, r->title))
-			&& (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
-			&& (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
-				c->isfloating = r->isfloating;
-				c->tags |= r->tags & TAGMASK ? r->tags & TAGMASK : tagset[seltags]; 
-			}
+	xh = XGetClassHint(dpy, c->win, &ch);
+	for(i = 0; i < LENGTH(rules); i++) {
+		r = &rules[i];
+		if((!r->title || strstr(c->name, r->title))
+		&& (!r->class || (xh && ch.res_class && strstr(ch.res_class, r->class)))
+		&& (!r->instance || (xh && ch.res_name && strstr(ch.res_name, r->instance)))) {
+			c->isfloating = r->isfloating;
+			c->tags |= r->tags & TAGMASK ? r->tags & TAGMASK : tagset[seltags]; 
 		}
+	}
+	if( xh ) {
 		if(ch.res_class)
 			XFree(ch.res_class);
 		if(ch.res_name)