diff --git a/js/ui/appMenu.js b/js/ui/appMenu.js
index ae6aa16a0..42c92a422 100644
--- a/js/ui/appMenu.js
+++ b/js/ui/appMenu.js
@@ -55,8 +55,12 @@ var AppMenu = class AppMenu extends PopupMenu.PopupMenu {
 
         this.addAction(_('Quit'), () => this._app.request_quit());
 
-        this._appSystem.connect('installed-changed',
-            () => this._updateDetailsVisibility());
+        this._signals = [];
+        this._signals.push([
+            this._appSystem,
+            this._appSystem.connect('installed-changed',
+                () => this._updateDetailsVisibility()),
+        ]);
         this._updateDetailsVisibility();
     }
 
@@ -65,6 +69,17 @@ var AppMenu = class AppMenu extends PopupMenu.PopupMenu {
         this._detailsItem.visible = sw !== null;
     }
 
+    /** */
+    destroy() {
+        super.destroy();
+
+        for (const [obj, id] of this._signals)
+            obj.disconnect(id);
+        this._signals = [];
+
+        this.setApp(null);
+    }
+
     /**
      * @returns {bool} - true if the menu is empty
      */