diff --git a/scripts/mosh.pl b/scripts/mosh.pl
index 41c31b0..7cf69e1 100755
--- a/scripts/mosh.pl
+++ b/scripts/mosh.pl
@@ -219,11 +219,14 @@ if ( defined $fake_proxy ) {
 
   defined( my $pid = fork ) or die "$0: fork: $!\n";
   if ( $pid == 0 ) {
+    close STDIN;
     cat $sock, \*STDOUT; $sock->shutdown( 0 );
     _exit 0;
   }
   $SIG{ 'HUP' } = 'IGNORE';
+  close STDOUT;
   cat \*STDIN, $sock; $sock->shutdown( 1 );
+  close STDIN;
   waitpid $pid, 0;
   exit;
 }