--- a/main.c	Thu Sep 07 09:26:01 2006 +0200
+++ b/main.c	Thu Sep 07 17:53:40 2006 +0200
@@ -27,6 +27,7 @@
 Bool maximized = False;
 Client *clients = NULL;
 Client *sel = NULL;
+Client *stack = NULL;
 Cursor cursor[CurLast];
 Display *dpy;
 DC dc = {0};