diff --git a/src/mod_muc_admin.erl b/src/mod_muc_admin.erl
index 6a125d848..616d54d28 100644
--- a/src/mod_muc_admin.erl
+++ b/src/mod_muc_admin.erl
@@ -116,14 +116,14 @@ get_commands_spec() ->
 		       module = ?MODULE, function = muc_register_nick,
 		       args_desc = ["Nick", "User JID", "Server Host"],
 		       args_example = [<<"Tim">>, <<"tim@example.org">>, <<"example.org">>],
-		       args = [{nick, binary}, {jid, binary}, {serverhost, binary}],
+		       args = [{nick, binary}, {jid, binary}, {host, binary}],
 		       result = {res, rescode}},
      #ejabberd_commands{name = muc_unregister_nick, tags = [muc],
 		       desc = "Unregister the nick registered by that account in the MUC service",
 		       module = ?MODULE, function = muc_unregister_nick,
 		       args_desc = ["User JID", "MUC service"],
 		       args_example = [<<"tim@example.org">>, <<"example.org">>],
-		       args = [{jid, binary}, {serverhost, binary}],
+		       args = [{jid, binary}, {host, binary}],
 		       result = {res, rescode}},
 
      #ejabberd_commands{name = create_room, tags = [muc_room],