--- AnyEvent/lib/AnyEvent.pm	2009/04/01 14:08:27	1.201
+++ AnyEvent/lib/AnyEvent.pm	2009/04/01 15:29:00	1.202
@@ -1101,6 +1101,7 @@
 
    $SIG_CB{$signal}{$arg{cb}} = $arg{cb};
    $SIG{$signal} ||= sub {
+      local $!;
       syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV;
       undef $SIG_EV{$signal};
    };