diff -r 5804117fb298 -r 4fb8809f2f97 finch/libgnt/gntwm.c
--- a/finch/libgnt/gntwm.c	Thu Aug 22 09:59:29 2013 +0200
+++ b/finch/libgnt/gntwm.c	Thu Aug 22 10:42:25 2013 +0200
@@ -427,6 +427,7 @@
 
 	w = wm->cws->ordered->data;
 	orgpos = pos = g_list_index(wm->cws->list, w);
+	g_return_if_fail(pos < 0);
 
 	do {
 		pos += direction;
@@ -434,7 +435,7 @@
 		if (pos < 0) {
 			wid = g_list_last(wm->cws->list)->data;
 			pos = g_list_length(wm->cws->list) - 1;
-		} else if (pos >= g_list_length(wm->cws->list)) {
+		} else if ((guint)pos >= g_list_length(wm->cws->list)) {
 			wid = wm->cws->list->data;
 			pos = 0;
 		} else