1 files changed, 4 insertions, 0 deletions
diff --git a/lib/PublicInbox/Admin.pm b/lib/PublicInbox/Admin.pm
index dcf17cf5..a17a632c 100644
--- a/lib/PublicInbox/Admin.pm
+++ b/lib/PublicInbox/Admin.pm
@@ -368,6 +368,10 @@ sub index_prepare ($$) {
                                          or die "`$git_key=$s' not boolean\n";
                  $opt->{$k} = $v;
          }
+        for my $k (qw(since until)) {
+                my $v = $opt->{$k} // next;
+                $opt->{reindex} or die "--$k=$v requires --reindex\n";
+        }
          $env;
  }