diff --git a/src/prefs.js b/src/prefs.js
index 22e946f..43be561 100644
--- a/src/prefs.js
+++ b/src/prefs.js
@@ -552,8 +552,7 @@ export default class CoverflowAltTabPreferences extends ExtensionPreferences {
               settings.set_double("prefs-default-width", currentWidth);
               settings.set_double("prefs-default-height", currentHeight);
             }
-            window.destroy();
-          });
+        });
     }
 }