--- AnyEvent-MP/MP.pm	2009/09/22 09:38:28	1.90
+++ AnyEvent-MP/MP.pm	2009/09/22 14:14:43	1.94
@@ -150,7 +150,7 @@
 our @EXPORT = qw(
    NODE $NODE *SELF node_of after
    configure
-   snd rcv mon mon_guard kil reg psub spawn cal
+   snd rcv mon mon_guard kil psub spawn cal
    port
 );
 
@@ -567,7 +567,7 @@
    $node->monitor ($port, $cb);
 
    defined wantarray
-      and AnyEvent::Util::guard { $node->unmonitor ($port, $cb) }
+      and ($cb += 0, AnyEvent::Util::guard { $node->unmonitor ($port, $cb) })
 }
 
 =item $guard = mon_guard $port, $ref, $ref...