diff --git a/chrome/content/zotero/xpcom/db.js b/chrome/content/zotero/xpcom/db.js
index c19f38732..93c9e3263 100644
--- a/chrome/content/zotero/xpcom/db.js
+++ b/chrome/content/zotero/xpcom/db.js
@@ -956,40 +956,12 @@ Zotero.DBConnection.prototype._getDBConnection = function () {
 	// Implements mozIStorageFunction
 	// TODO: move somewhere else
 	var lev = {
-		min3: function (a, b, c) {
-			var min;
-			min = a;
-			if (b < min)
-				min = b;
-			if (c < min)
-				min = c;
-			return min;
-		},
+		ZU: new Zotero.Utilities,
 		
 		onFunctionCall: function (arg) {
 			var a = arg.getUTF8String(0);
 			var b = arg.getUTF8String(1);
-			
-			var arr = new Array(a.length+1);
-			var i, j, cost;
-		
-			for(i=0; i<=a.length; i++)
-				arr[i] = new Array(b.length);
-		
-			for (i = 0; i <= a.length; i++) {
-				arr[i][0] = i;
-			}
-			for (j = 0; j <= b.length; j++) {
-				arr[0][j] = j;
-			}
-		
-			for (i = 1; i <= a.length; i++) {
-				for (j = 1; j <= b.length; j++) {
-					cost = (a[i-1] == b[j-1])? 0 : 1;
-					arr[i][j] = this.min3(arr[i-1][j] + 1, arr[i][j-1] + 1, arr[i-1][j-1] + cost);
-				}
-			}
-			return arr[a.length][b.length];
+			return this.ZU.levenshtein(a, b);
 		}
 	};
 	
diff --git a/chrome/content/zotero/xpcom/utilities.js b/chrome/content/zotero/xpcom/utilities.js
index 7f3200c6e..25bee855e 100644
--- a/chrome/content/zotero/xpcom/utilities.js
+++ b/chrome/content/zotero/xpcom/utilities.js
@@ -251,6 +251,43 @@ Zotero.Utilities.prototype.parseMarkup = function(str) {
 }
 
 
+Zotero.Utilities.prototype.min3 = function (a, b, c) {
+	var min;
+	min = a;
+	if (b < min) {
+		min = b;
+	}
+	if (c < min) {
+		min = c;
+	}
+	return min;
+}
+
+
+Zotero.Utilities.prototype.levenshtein = function (a, b) {
+	var arr = new Array(a.length+1);
+	var i, j, cost;
+
+	for(i=0; i<=a.length; i++)
+		arr[i] = new Array(b.length);
+
+	for (i = 0; i <= a.length; i++) {
+		arr[i][0] = i;
+	}
+	for (j = 0; j <= b.length; j++) {
+		arr[0][j] = j;
+	}
+
+	for (i = 1; i <= a.length; i++) {
+		for (j = 1; j <= b.length; j++) {
+			cost = (a[i-1] == b[j-1])? 0 : 1;
+			arr[i][j] = this.min3(arr[i-1][j] + 1, arr[i][j-1] + 1, arr[i-1][j-1] + cost);
+		}
+	}
+	return arr[a.length][b.length];
+}
+
+
 /*
  * Test if a string is an integer
  */