diff --git a/qubesmanager/qube_manager.py b/qubesmanager/qube_manager.py
index 3b4cbde3..3e4e4a1a 100644
--- a/qubesmanager/qube_manager.py
+++ b/qubesmanager/qube_manager.py
@@ -426,7 +426,7 @@ def data(self, index, role):
         ret = None
         if role == Qt.UserRole + 1:
             if vm.qid == 0:
-                return ""
+                ret = ""
             elif col_name == "Type":
                 ret = vm.klass
             elif col_name == "Label":