--- AnyEvent/lib/AnyEvent.pm	2006/12/31 11:54:43	1.22
+++ AnyEvent/lib/AnyEvent.pm	2007/03/07 17:37:24	1.23
@@ -249,7 +249,7 @@
 use strict;
 use Carp;
 
-our $VERSION = '2.51';
+our $VERSION = '2.52';
 our $MODEL;
 
 our $AUTOLOAD;
@@ -388,12 +388,14 @@
    $PID_CB{$pid}{$arg{cb}} = $arg{cb};
 
    unless ($WNOHANG) {
-      $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_child_wait);
       $WNOHANG = eval { require POSIX; &POSIX::WNOHANG } || 1;
    }
 
-   # child could be a zombie already
-   $PID_IDLE ||= AnyEvent->timer (after => 0, cb => \&_child_wait);
+   unless ($CHLD_W) {
+      $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_child_wait);
+      # child could be a zombie already
+      $PID_IDLE ||= AnyEvent->timer (after => 0, cb => \&_child_wait);
+   }
 
    bless [$pid, $arg{cb}], "AnyEvent::Base::Child"
 }