diff --git a/dwm.c b/dwm.c
index 1bbb4b3..fe5069d 100644
--- a/dwm.c
+++ b/dwm.c
@@ -829,7 +829,7 @@ void
 focusstack(const Arg *arg) {
 	Client *c = NULL, *i;
 
-	if(!selmon->sel)
+	if(!selmon->sel || selmon->sel->isfullscreen)
 		return;
 	if(arg->i > 0) {
 		for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);