diff --git a/chrome/content/zotero/xpcom/utilities.js b/chrome/content/zotero/xpcom/utilities.js
index f470c27a0..4ee1ea904 100644
--- a/chrome/content/zotero/xpcom/utilities.js
+++ b/chrome/content/zotero/xpcom/utilities.js
@@ -324,21 +324,6 @@ Zotero.Utilities.prototype.levenshtein = function (a, b) {
 }
 
 
-/**
- * Test if a string is an integer
- *
- * @deprecated Use isNaN(parseInt(x))
- * @type Boolean
- */
-Zotero.Utilities.prototype.isInt = function(x) {
-	if(parseInt(x) == x) {
-		return true;
-	}
-	return false;
-}
-
-
-
 /**
  * Test if an object is empty
  *