diff --git a/chrome/skin/default/zotero/timeline/timeline.html b/chrome/skin/default/zotero/timeline/timeline.html
index b0e332a0dd..4c641c4bfa 100644
--- a/chrome/skin/default/zotero/timeline/timeline.html
+++ b/chrome/skin/default/zotero/timeline/timeline.html
@@ -79,12 +79,7 @@
 			}
 			
 			Timeline.DurationEventPainter.prototype._showBubble = function(x, y, evt) {
-				// Get ChromeWindow so we have access to ZoteroPane (overlay.js)
-				var wm = Components.classes["@mozilla.org/appshell/window-mediator;1"]
-					.getService(Components.interfaces.nsIWindowMediator);
-				var win = wm.getMostRecentWindow('navigator:browser');
-				var zp = win.ZoteroPane;
-				zp.show();
+				let zp = Zotero.getActiveZoteroPane();
 				zp.selectItem(parseInt(evt.getDescription()));
 			}