diff --git a/lib/OpenLayers/Control/PanZoomBar.js b/lib/OpenLayers/Control/PanZoomBar.js
index 730eefdaa6..33459aade3 100644
--- a/lib/OpenLayers/Control/PanZoomBar.js
+++ b/lib/OpenLayers/Control/PanZoomBar.js
@@ -197,8 +197,8 @@ OpenLayers.Control.PanZoomBar.prototype =
         if (!Event.isLeftClick(evt)) return;
         if (this.zoomStart) {
             this.div.style.cursor="default";
-            this.map.events.remove("mousemove");
-            this.map.events.remove("mouseup");
+            this.map.events.unregister("mouseup", this, this.passEventToSlider);
+            this.map.events.unregister("mousemove", this, this.passEventToSlider);
             var deltaY = this.zoomStart.y - evt.xy.y
             this.map.zoomTo(this.map.zoom + Math.round(deltaY/this.zoomStopHeight));
             this.moveZoomBar();