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-rw-r--r--lib/PublicInbox/OverIdx.pm6
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/PublicInbox/OverIdx.pm b/lib/PublicInbox/OverIdx.pm
index e1cd31b9..66dec099 100644
--- a/lib/PublicInbox/OverIdx.pm
+++ b/lib/PublicInbox/OverIdx.pm
@@ -264,8 +264,10 @@ sub add_overview {
         $smsg->{lines} = $eml->body_raw =~ tr!\n!\n!;
         my $mids = mids_for_index($eml);
         my $refs = $smsg->parse_references($eml, $mids);
-        $mids->[0] //= $smsg->{mid} //= $eml->{-lei_fake_mid};
-        $smsg->{mid} //= '';
+        $mids->[0] //= do {
+                $smsg->{mid} //= '';
+                $eml->{-lei_fake_mid};
+        };
         my $subj = $smsg->{subject};
         my $xpath;
         if ($subj ne '') {