diff --git a/chrome/content/zotero/xpcom/utilities.js b/chrome/content/zotero/xpcom/utilities.js
index 59b6501e2a..8b282ad28f 100644
--- a/chrome/content/zotero/xpcom/utilities.js
+++ b/chrome/content/zotero/xpcom/utilities.js
@@ -85,7 +85,6 @@ Zotero.Utilities = {
 	 */
 	"trim":function(/**String*/ s) {
 		if (typeof(s) != "string") {
-		a()
 			throw "trim: argument must be a string";
 		}