lib/PublicInbox/SearchIdx.pm | 2 +-

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index ca1457fd437d3022f0733ce7e908c0d27e6e0786..0d983aabdc9825044ec9cdbe1b6fafd21a2e7779 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -433,7 +433,7 @@ 	eval {
 		batch_do($self, 'Q' . $mid, sub {
 			my ($ids) = @_;
 			$db->delete_document($_) for @$ids;
-			$nr = scalar @$ids;
+			$nr += scalar @$ids;
 		});
 	};
 	if ($@) {