diff --git a/src/plugins/DefaultGadgets.py b/src/plugins/DefaultGadgets.py
index fc5e63a30..62a58145a 100644
--- a/src/plugins/DefaultGadgets.py
+++ b/src/plugins/DefaultGadgets.py
@@ -318,7 +318,7 @@ class PythonGadget(Gadget):
                 line = line[2:]
             # update dbstate, in case in changed:
             self.env["dbstate"] = self.gui.dbstate
-            _retval = "error"
+            _retval = None
             if "_retval" in self.env:
                 del self.env["_retval"]
             exp1 = """_retval = """ + string.strip(line)