lib/PublicInbox/WWW.pm | 3 ++-

diff --git a/lib/PublicInbox/WWW.pm b/lib/PublicInbox/WWW.pm
index 50b6950cf6aca523e6dc8e708cab6bb193f28af8..7670224f0a45db71f13a2b6da2da8bfa8af6c1f2 100644
--- a/lib/PublicInbox/WWW.pm
+++ b/lib/PublicInbox/WWW.pm
@@ -127,7 +127,8 @@ 	} elsif ($path_info =~ m!$INBOX_RE/([\w\-\.]+)\.css\z!o) {
 		get_css($ctx, $1, $2);
 	} elsif ($path_info =~ m!$INBOX_RE/($OID_RE)/s/\z!o) {
 		get_vcs_object($ctx, $1, $2);
-	} elsif ($path_info =~ m!$INBOX_RE/($OID_RE)/s/([\w\.\-]+)\z!o) {
+	} elsif ($path_info =~ m!$INBOX_RE/($OID_RE)/s/
+				($PublicInbox::Hval::FN)\z!ox) {
 		get_vcs_object($ctx, $1, $2, $3);
 	} elsif ($path_info =~ m!$INBOX_RE/($OID_RE)/s\z!o) {
 		r301($ctx, $1, $2, 's/');