diff --git a/src/Umbraco.Web.UI.Client/src/common/directives/components/tree/umbtree.directive.js b/src/Umbraco.Web.UI.Client/src/common/directives/components/tree/umbtree.directive.js
index be743ea21c..980387a920 100644
--- a/src/Umbraco.Web.UI.Client/src/common/directives/components/tree/umbtree.directive.js
+++ b/src/Umbraco.Web.UI.Client/src/common/directives/components/tree/umbtree.directive.js
@@ -446,7 +446,7 @@ function umbTreeDirective($compile, $log, $q, $rootScope, treeService, notificat
                 loadTree().then(function () {
                     //because angular doesn't return a promise for the resolve method, we need to resort to some hackery, else
                     //like normal JS promises we could do resolve(...).then() 
-                    if (args.onLoaded && angular.isFunction(args.onLoaded)) {
+                    if (args && args.onLoaded && angular.isFunction(args.onLoaded)) {
                         args.onLoaded();
                     }
                 });
diff --git a/src/Umbraco.Web.UI.Client/src/views/common/overlays/treepicker/treepicker.controller.js b/src/Umbraco.Web.UI.Client/src/views/common/overlays/treepicker/treepicker.controller.js
index dec40440f2..aea4e6051d 100644
--- a/src/Umbraco.Web.UI.Client/src/views/common/overlays/treepicker/treepicker.controller.js
+++ b/src/Umbraco.Web.UI.Client/src/views/common/overlays/treepicker/treepicker.controller.js
@@ -171,7 +171,7 @@ angular.module("umbraco").controller("Umbraco.Overlays.TreePickerController",
                 queryParams["startNodeId"] = $scope.model.startNodeId;
             }
             if (vm.selectedLanguage && vm.selectedLanguage.id) {
-                queryParams["languageId"] = vm.selectedLanguage.id;
+                queryParams["culture"] = vm.selectedLanguage.culture;
             }
             var queryString = $.param(queryParams); //create the query string from the params object