diff --git a/src/Orchard.Web/Modules/Orchard.ContentPicker/Scripts/ContentPicker.js b/src/Orchard.Web/Modules/Orchard.ContentPicker/Scripts/ContentPicker.js
index 8957d46d2..478048c22 100644
--- a/src/Orchard.Web/Modules/Orchard.ContentPicker/Scripts/ContentPicker.js
+++ b/src/Orchard.Web/Modules/Orchard.ContentPicker/Scripts/ContentPicker.js
@@ -18,7 +18,7 @@
         var baseUrl = data.baseUrl;
 
         // remove trailing slash if any
-        if (baseUrl.substr(-1) == '/')
+        if (baseUrl.slice(-1) == '/')
             baseUrl = baseUrl.substr(0, baseUrl.length - 1);
 
         var url = baseUrl