diff --git a/plugins/Owner/plugin.py b/plugins/Owner/plugin.py
index 5c3d895f8..e0d6f5332 100644
--- a/plugins/Owner/plugin.py
+++ b/plugins/Owner/plugin.py
@@ -315,7 +315,8 @@ class Owner(callbacks.Plugin):
             irc.errorInvalid('command', command)
         elif plugin:
             if not plugin.isCommand(command):
-                irc.errorInvalid('command in the %s plugin' % plugin, command)
+                irc.errorInvalid('command in the %s plugin' % plugin.name(),
+                                 command)
             registerDefaultPlugin(command, plugin.name())
             irc.replySuccess()
         else: