lib/PublicInbox/SearchIdx.pm | 2 +-

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index f4238fe8d5380aa1c2eecaaab0d01209b3418650..ec3a6f3ea928dfb64921be7e89ca1e3b7b3e4aad 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -837,7 +837,7 @@ 	my $w = delete $self->{w} or die "no pipe to write to\n";
 	print $w "close\n" or die "failed to write to pid:$pid: $!\n";
 	close $w or die "failed to close pipe for pid:$pid: $!\n";
 	waitpid($pid, 0) == $pid or die "remote process did not finish";
-	$? == 0 or die ref($self)." exited with: $?";
+	$? == 0 or die ref($self)." pid:$pid exited with: $?";
 }
 
 1;