diff --git a/src/Umbraco.Web.UI/umbraco/developer/RelationTypes/TreeMenu/ActionDeleteRelationType.js b/src/Umbraco.Web.UI/umbraco/developer/RelationTypes/TreeMenu/ActionDeleteRelationType.js
index a776e01632..2a2d36eda1 100644
--- a/src/Umbraco.Web.UI/umbraco/developer/RelationTypes/TreeMenu/ActionDeleteRelationType.js
+++ b/src/Umbraco.Web.UI/umbraco/developer/RelationTypes/TreeMenu/ActionDeleteRelationType.js
@@ -3,7 +3,7 @@
     if (confirm('Are you sure you want to delete "' + relationTypeName + '"?')) {
         $.ajax({
             type: "POST",
-            url: "/umbraco/developer/RelationTypes/RelationTypesWebService.asmx/DeleteRelationType",
+            url: "developer/RelationTypes/RelationTypesWebService.asmx/DeleteRelationType",
             data: "{ 'relationTypeId' : '" + relationTypeId + "' }",
             contentType: "application/json; charset=utf-8",
             dataType: "json",