diff --git a/synapse/events/spamcheck.py b/synapse/events/spamcheck.py
index fe2d22a6f..8b01c091e 100644
--- a/synapse/events/spamcheck.py
+++ b/synapse/events/spamcheck.py
@@ -46,7 +46,7 @@ class SpamChecker(object):
 
         return self.spam_checker.check_event_for_spam(event)
 
-    def user_may_invite(self, userid, roomid):
+    def user_may_invite(self, userid, room_id):
         """Checks if a given user may send an invite
 
         If this method returns false, the invite will be rejected.
@@ -60,4 +60,4 @@ class SpamChecker(object):
         if self.spam_checker is None:
             return True
 
-        return self.spam_checker.user_may_invite(userid, roomid)
+        return self.spam_checker.user_may_invite(userid, room_id)