diff --git a/chrome/content/zotero/xpcom/data/item.js b/chrome/content/zotero/xpcom/data/item.js
index 360b6bd66..cee972116 100644
--- a/chrome/content/zotero/xpcom/data/item.js
+++ b/chrome/content/zotero/xpcom/data/item.js
@@ -3623,27 +3623,23 @@ Zotero.Item.prototype.multiDiff = function (otherItems, ignoreFields) {
 	var hasDiffs = false;
 	
 	for (let i = 0; i < otherItems.length; i++) {
-		let otherItem = otherItems[i];
-		let diff = [];
-		let otherData = otherItem.toJSON();
-		let numDiffs = this.ObjectsClass.diff(thisData, otherData, diff);
+		let otherData = otherItems[i].toJSON();
+		let changeset = Zotero.DataObjectUtilities.diff(thisData, otherData, ignoreFields);
 		
-		if (numDiffs) {
-			for (let field in diff[1]) {
-				if (ignoreFields && ignoreFields.indexOf(field) != -1) {
-					continue;
-				}
-				
-				var value = diff[1][field];
-				
-				if (!alternatives[field]) {
-					hasDiffs = true;
-					alternatives[field] = [value];
-				}
-				else if (alternatives[field].indexOf(value) == -1) {
-					hasDiffs = true;
-					alternatives[field].push(value);
-				}
+		for (let i = 0; i < changeset.length; i++) {
+			let change = changeset[i];
+			
+			if (change.op == 'delete') {
+				continue;
+			}
+			
+			if (!alternatives[change.field]) {
+				hasDiffs = true;
+				alternatives[change.field] = [change.value];
+			}
+			else if (alternatives[change.field].indexOf(change.value) == -1) {
+				hasDiffs = true;
+				alternatives[change.field].push(change.value);
 			}
 		}
 	}
diff --git a/test/tests/itemTest.js b/test/tests/itemTest.js
index de3482905..1a05fcbd5 100644
--- a/test/tests/itemTest.js
+++ b/test/tests/itemTest.js
@@ -853,6 +853,38 @@ describe("Zotero.Item", function () {
 		})
 	})
 	
+	
+	describe("#multiDiff", function () {
+		it("should return set of alternatives for differing fields in other items", function* () {
+			var type = 'item';
+			
+			var dates = ['2016-03-08 17:44:45'];
+			var accessDates = ['2016-03-08T18:44:45Z'];
+			var urls = ['http://www.example.com', 'http://example.net'];
+			
+			var obj1 = createUnsavedDataObject(type);
+			obj1.setField('date', '2016-03-07 12:34:56'); // different in 1 and 3, not in 2
+			obj1.setField('url', 'http://example.com'); // different in all three
+			obj1.setField('title', 'Test'); // only in 1
+			
+			var obj2 = createUnsavedDataObject(type);
+			obj2.setField('url', urls[0]);
+			obj2.setField('accessDate', accessDates[0]); // only in 2
+			
+			var obj3 = createUnsavedDataObject(type);
+			obj3.setField('date', dates[0]);
+			obj3.setField('url', urls[1]);
+			
+			var alternatives = obj1.multiDiff([obj2, obj3]);
+			
+			assert.sameMembers(Object.keys(alternatives), ['url', 'date', 'accessDate']);
+			assert.sameMembers(alternatives.url, urls);
+			assert.sameMembers(alternatives.date, dates);
+			assert.sameMembers(alternatives.accessDate, accessDates);
+		});
+	});
+	
+	
 	describe("#clone()", function () {
 		// TODO: Expand to other data
 		it("should copy creators", function* () {