diff --git a/alt-tab-macos/api-wrappers/CGWindow.swift b/alt-tab-macos/api-wrappers/CGWindow.swift
index 58d1887d9..658462da1 100644
--- a/alt-tab-macos/api-wrappers/CGWindow.swift
+++ b/alt-tab-macos/api-wrappers/CGWindow.swift
@@ -11,7 +11,7 @@ extension CGWindow {
     static func isMissionControlActive() -> Bool {
         // when Mission Control is active, the Dock process spawns some windows. We observe this side-effect and infer
         for window in windows(.optionOnScreenOnly) {
-            guard window.ownerName() == "Dock" else { continue }
+            guard window.ownerName() == "Dock", window.title() == nil else { continue }
             return true
         }
         return false