diff --git a/chrome/content/zotero/xpcom/api.js b/chrome/content/zotero/xpcom/api.js
index 2a38a569bd..a732c78001 100644
--- a/chrome/content/zotero/xpcom/api.js
+++ b/chrome/content/zotero/xpcom/api.js
@@ -201,7 +201,7 @@ Zotero.API.Data = {
 		var params = this.parsePath(path);
 		//Zotero.debug(params);
 		
-		return Zotero.DataObjectUtilities.getClassForObjectType(params.objectType)
+		return Zotero.DataObjectUtilities.getObjectsClassForObjectType(params.objectType)
 			.apiDataGenerator(params);
 	}
 };
diff --git a/chrome/content/zotero/xpcom/data/dataObject.js b/chrome/content/zotero/xpcom/data/dataObject.js
index 8452e9e0a3..092f554617 100644
--- a/chrome/content/zotero/xpcom/data/dataObject.js
+++ b/chrome/content/zotero/xpcom/data/dataObject.js
@@ -70,6 +70,10 @@ Zotero.defineProperty(Zotero.DataObject.prototype, 'parentID', {
 	set: function(v) this._setParentID(v)
 });
 
+Zotero.defineProperty(Zotero.DataObject.prototype, 'ObjectsClass', {
+	get: function() Zotero.DataObjectUtilities.getObjectsClassForObjectType(this.objectType)
+});
+
 
 Zotero.DataObject.prototype._get = function (field) {
 	if (this['_' + field] !== null) {
@@ -135,7 +139,7 @@ Zotero.DataObject.prototype._getParentID = function () {
 	if (!this._parentKey) {
 		return false;
 	}
-	return this._parentID = this._getClass().getIDFromLibraryAndKey(this._libraryID, this._parentKey);
+	return this._parentID = this.ObjectsClass.getIDFromLibraryAndKey(this._libraryID, this._parentKey);
 }
 
 
@@ -148,7 +152,7 @@ Zotero.DataObject.prototype._getParentID = function () {
 Zotero.DataObject.prototype._setParentID = function (id) {
 	return this._setParentKey(
 		id
-		? this._getClass().getLibraryAndKeyFromID(Zotero.DataObjectUtilities.checkDataID(id))[1]
+		? this.ObjectsClass.getLibraryAndKeyFromID(Zotero.DataObjectUtilities.checkDataID(id))[1]
 		: null
 	);
 }
@@ -368,13 +372,6 @@ Zotero.DataObject.prototype._requireData = function (dataType) {
 	}
 }
 
-/**
- * Returns a global Zotero class object given a data object. (e.g. Zotero.Items)
- * @return {obj} One of Zotero data classes
- */
-Zotero.DataObject.prototype._getClass = function () {
-	return Zotero.DataObjectUtilities.getClassForObjectType(this._objectType);
-}
 
 /**
  * Loads data for a given data type
diff --git a/chrome/content/zotero/xpcom/data/dataObjectUtilities.js b/chrome/content/zotero/xpcom/data/dataObjectUtilities.js
index 854419f439..fa70c0b9c0 100644
--- a/chrome/content/zotero/xpcom/data/dataObjectUtilities.js
+++ b/chrome/content/zotero/xpcom/data/dataObjectUtilities.js
@@ -59,12 +59,12 @@ Zotero.DataObjectUtilities = {
 	},
 	
 	
-	"getObjectTypePlural": function getObjectTypePlural(objectType) {
+	"getObjectTypePlural": function(objectType) {
 		return objectType == 'search' ? 'searches' : objectType + 's';
 	},
 	
 	
-	"getClassForObjectType": function getClassForObjectType(objectType) {
+	"getObjectsClassForObjectType": function(objectType) {
 		var objectTypePlural = this.getObjectTypePlural(objectType);
 		var className = objectTypePlural[0].toUpperCase() + objectTypePlural.substr(1);
 		return Zotero[className]
diff --git a/chrome/content/zotero/xpcom/search.js b/chrome/content/zotero/xpcom/search.js
index 4a81d05c8c..ad60732603 100644
--- a/chrome/content/zotero/xpcom/search.js
+++ b/chrome/content/zotero/xpcom/search.js
@@ -1201,7 +1201,7 @@ Zotero.Search.prototype._buildQuery = Zotero.Promise.coroutine(function* () {
 						let objLibraryID;
 						let objKey = condition.value;
 						let objectType = condition.name == 'collection' ? 'collection' : 'search';
-						let objectTypeClass = Zotero.DataObjectUtilities.getClassForObjectType(objectType);
+						let objectTypeClass = Zotero.DataObjectUtilities.getObjectsClassForObjectType(objectType);
 						
 						// Old-style library-key hash
 						if (objKey.contains('_')) {