diff --git a/src/plugins/plugin_misc_invitations.py b/src/plugins/plugin_misc_invitations.py
index 10988da5..2e7ef2fd 100644
--- a/src/plugins/plugin_misc_invitations.py
+++ b/src/plugins/plugin_misc_invitations.py
@@ -161,7 +161,7 @@ class InvitationsPlugin(object):
 
         self.checkExtra(extra)
 
-        if not 'url_template' in extra and not 'message_body' in extra:
+        if not 'url_template' in kwargs and not 'message_body' in kwargs:
             raise ValueError(_(u"You need to provide url_template if you use default message body"))