1 files changed, 1 insertions, 1 deletions
diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm
index 39ec35c3..9d4262c1 100644
--- a/lib/PublicInbox/View.pm
+++ b/lib/PublicInbox/View.pm
@@ -230,7 +230,7 @@ sub to_cc_html ($$$$) {
                          }
                  }
                  $line_len += length($n);
-                $url = $addr2url->{lc $pair->[1]};
+                $url = $addr2url->{lc($pair->[1] // '')};
                  $html .= $url ? qq(<a\nhref="$url$t">$n</a>) : $n;
          }
          ($html, $len + $line_len);