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-rw-r--r--lib/PublicInbox/WWW.pm2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/PublicInbox/WWW.pm b/lib/PublicInbox/WWW.pm
index b6f18f8d..50b6950c 100644
--- a/lib/PublicInbox/WWW.pm
+++ b/lib/PublicInbox/WWW.pm
@@ -28,7 +28,7 @@ use PublicInbox::UserContent;
 our $INBOX_RE = qr!\A/([\w\-][\w\.\-]*)!;
 our $MID_RE = qr!([^/]+)!;
 our $END_RE = qr!(T/|t/|t\.mbox(?:\.gz)?|t\.atom|raw|)!;
-our $ATTACH_RE = qr!(\d[\.\d]*)-([[:alnum:]][\w\.-]+[[:alnum:]])!i;
+our $ATTACH_RE = qr!([0-9][0-9\.]*)-($PublicInbox::Hval::FN)!;
 our $OID_RE = qr![a-f0-9]{7,40}!;
 
 sub new {