1 files changed, 1 insertions, 1 deletions
diff --git a/lib/PublicInbox/IMAP.pm b/lib/PublicInbox/IMAP.pm
index 68a7e050..226e98a2 100644
--- a/lib/PublicInbox/IMAP.pm
+++ b/lib/PublicInbox/IMAP.pm
@@ -1142,7 +1142,7 @@ sub search_common {
                  };
                  my $mset = $srch->mset($q, $opt);
                  my $uids = $srch->mset_to_artnums($mset, $opt);
-                msn_convert($self, $uids) if $want_msn;
+                msn_convert($self, $uids) if scalar(@$uids) && $want_msn;
                  "* SEARCH @$uids\r\n$tag OK Search done\r\n";
          } else {
                  "$tag BAD Error\r\n";