diff --git a/mux/src/window.rs b/mux/src/window.rs
index 977372ef856..a086e3a3191 100644
--- a/mux/src/window.rs
+++ b/mux/src/window.rs
@@ -131,8 +131,8 @@ impl Window {
 
         if len > 0 && self.active >= len {
             self.set_active_without_saving(len - 1);
-        } else if len > 0 {
-            self.set_active_without_saving(self.active);
+        } else {
+            self.invalidate();
         }
     }