lib/PublicInbox/SearchIdx.pm | 2 +-

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index 9c291066487d03be512706442f45df4c3e1022c4..b963805ee237314d0aefc2a346b89bbebc683039 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -694,7 +694,7 @@ 	} else {
 		$lx = $lm;
 	}
 	# Use last_commit from msgmap if it is older or unset
-	if (!$lm || ($lx && $lx && is_ancestor($self->{git}, $lm, $lx))) {
+	if (!$lm || ($lx && $lm && is_ancestor($self->{git}, $lm, $lx))) {
 		$lx = $lm;
 	}
 	$lx;