diff --git a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/tags/tags.controller.js b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/tags/tags.controller.js
index 688ac7693f..a61930f877 100644
--- a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/tags/tags.controller.js
+++ b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/tags/tags.controller.js
@@ -1,9 +1,12 @@
 angular.module("umbraco")
 .controller("Umbraco.PropertyEditors.TagsController",
-    function ($scope) {
+    function ($scope, angularHelper) {
 
         $scope.valueChanged = function(value) {
             $scope.model.value = value;
+            // the model value seems to be a reference to the same array, so we need
+            // to set the form as dirty explicitly when the content of the array changes
+            angularHelper.getCurrentForm($scope).$setDirty();
         }
 
     }