diff --git a/lib/OpenLayers/Control/OverviewMap.js b/lib/OpenLayers/Control/OverviewMap.js
index b3fb971c60..cc965d6c9f 100644
--- a/lib/OpenLayers/Control/OverviewMap.js
+++ b/lib/OpenLayers/Control/OverviewMap.js
@@ -180,7 +180,8 @@ OpenLayers.Control.OverviewMap.prototype =
         this.elementEvents.register('dblclick', this, function(e) {
             OpenLayers.Event.stop(e);
         });
-        this.rectEvents = new OpenLayers.Events(this, this.extentRectangle);
+        this.rectEvents = new OpenLayers.Events(this, this.extentRectangle,
+                                                null, true);
         this.rectEvents.register('mouseout', this, this.rectMouseOut);
         this.rectEvents.register('mousedown', this, this.rectMouseDown);
         this.rectEvents.register('mousemove', this, this.rectMouseMove);