lib/PublicInbox/Isearch.pm | 4 ++--

diff --git a/lib/PublicInbox/Isearch.pm b/lib/PublicInbox/Isearch.pm
index 8a1f257ae1062b67bbb4dadd9eacfc91024d8d2f..e362c80aec14ca3c60572c716f2954089406ca8e 100644
--- a/lib/PublicInbox/Isearch.pm
+++ b/lib/PublicInbox/Isearch.pm
@@ -89,7 +89,7 @@ 		$xnums[$idx] = $row->[1];
 	}
 	if (scalar keys %order) {
 		warn "W: $self->{es}->{topdir} #",
-			join(', #', sort keys %order),
+			join(', ', sort { $a <=> $b } keys %order),
 			" not mapped to `$self->{eidx_key}'\n";
 		warn "W: $self->{es}->{topdir} may need to be reindexed\n";
 		@xnums = grep { defined } @xnums;
@@ -113,7 +113,7 @@ 		$msgs[$idx] = $smsg;
 	}
 	if (scalar keys %order) {
 		warn "W: $ibx->{inboxdir} #",
-			join(', #', sort keys %order),
+			join(', ', sort { $a <=> $b } keys %order),
 			" no longer valid\n";
 		warn "W: $self->{es}->{topdir} may need to be reindexed\n";
 	}