diff --git a/src/layout/arrange.h b/src/layout/arrange.h
index 23b9d080..f1c97f3a 100644
--- a/src/layout/arrange.h
+++ b/src/layout/arrange.h
@@ -1223,6 +1223,10 @@ arrange(Monitor *m, bool want_animation, bool from_view) {
 	if (!m->wlr_output->enabled)
 		return;
 
+	if (!m->sel) {
+		m->sel = focustop(m);
+	}
+
 	pre_caculate_before_arrange(m, want_animation, from_view, false);
 
 	if (m->isoverview) {