diff --git a/extension.js b/extension.js
index 171ebd3..8e0de0b 100644
--- a/extension.js
+++ b/extension.js
@@ -62,8 +62,9 @@ class SignalMgt {
         this.fullname = this.name + '@' + this.group;
         this.dbus = dbus;
         this.menu = menu;
-        this.signals = new WeakMap();
-        this.widgets = new Array();
+        this.signals  = new WeakMap();
+        this.widgets  = new Array();
+        this.timeouts = new Array();
 
         this.nbClicks = 0;
         this.button = -1;
@@ -80,6 +81,8 @@ class SignalMgt {
     destructor() {
         for(let widgetIdx in this.widgets)
             this.disconnectWidgetSignals(this.widgets[widgetIdx]);
+        for(let timeoutIdx in this.timeouts)
+            GLib.Source.remove(this.timeouts[timeoutIdx]);
     }
     
     updateSignals(item) {
@@ -168,8 +171,9 @@ class SignalMgt {
             this.button = event.get_button();
             this.nbClicks = 1;
 
-            Mainloop.timeout_add(this.dbus.ClutterSettings['double-click-time'],
-                                 this._doClickCallback.bind(this));
+            let sourceId = Mainloop.timeout_add(this.dbus.ClutterSettings['double-click-time'],
+                                                this._doClickCallback.bind(this));
+            this.timeouts.push(sourceId);
         }
 
         return Clutter.EVENT_PROPAGATE;