diff -r 335c279dbff6 dwm.c
--- a/dwm.c	Tue Jun 14 22:28:16 2011 +0100
+++ b/dwm.c	Tue Aug 09 03:07:52 2011 +0100
@@ -1882,6 +1882,8 @@
 	if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
 		/* size is uninitialized, ensure that size.flags aren't used */
 		size.flags = PSize;
+	if(size.flags & (USPosition|USSize))
+		c->isfloating = True;
 	if(size.flags & PBaseSize) {
 		c->basew = size.base_width;
 		c->baseh = size.base_height;