lib/PublicInbox/LEI.pm | 2 +-

diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index abd7fc4823f18854d265192be3db174e4f3e1b4e..c017fd4e94f687d2ccfae51b8430140268626012 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -765,7 +765,7 @@ 		return send($sock, "recv_cmd failed: $!", MSG_EOR);
 	}
 	$self->{2}->autoflush(1); # keep stdout buffered until x_it|DESTROY
 	# $ENV_STR = join('', map { "\0$_=$ENV{$_}" } keys %ENV);
-	# $buf = "$$\0$argc\0".join("\0", @ARGV).$ENV_STR."\0\0";
+	# $buf = "$argc\0".join("\0", @ARGV).$ENV_STR."\0\0";
 	substr($buf, -2, 2, '') eq "\0\0" or  # s/\0\0\z//
 		return send($sock, 'request command truncated', MSG_EOR);
 	my ($argc, @argv) = split(/\0/, $buf, -1);