lib/PublicInbox/V2Writable.pm | 2 +-

diff --git a/lib/PublicInbox/V2Writable.pm b/lib/PublicInbox/V2Writable.pm
index 6a88f62aea1ab3042aef1875a23bd45d3dd643a0..dcbbbc77761750c5b69246a2ba0837920fffc709 100644
--- a/lib/PublicInbox/V2Writable.pm
+++ b/lib/PublicInbox/V2Writable.pm
@@ -1072,7 +1072,7 @@ 			warn "BUG: multiple articles linked to $oid\n",
 				join(',',sort keys %gone), "\n";
 		}
 		foreach my $num (keys %gone) {
-			$self->{unindexed}->{$_}++;
+			$self->{unindexed}->{$num}++;
 			$self->{mm}->num_delete($num);
 		}
 		unindex_oid_remote($self, $oid, $mid);