diff --git a/applications/admin/controllers/default.py b/applications/admin/controllers/default.py
index 211ed36f..4a142f22 100644
--- a/applications/admin/controllers/default.py
+++ b/applications/admin/controllers/default.py
@@ -646,7 +646,10 @@ def edit():
     # show settings tab and save prefernces
     if 'settings' in request.vars:
         if request.post_vars:  # save new preferences
-            post_vars = request.post_vars.items()
+            if PY2:
+                post_vars = request.post_vars.items()
+            else:
+                post_vars = list(request.post_vars.items())
             # Since unchecked checkbox are not serialized, we must set them as false by hand to store the correct preference in the settings
             post_vars += [(opt, 'false') for opt in preferences if opt not in request.post_vars]
             if config.save(post_vars):