lib/PublicInbox/IMAP.pm | 2 +-

diff --git a/lib/PublicInbox/IMAP.pm b/lib/PublicInbox/IMAP.pm
index d4ef6efe156d2b3efde19d4eafa08aa3a760b73d..373bffc18d9ade459410155abf93ce77194c02be 100644
--- a/lib/PublicInbox/IMAP.pm
+++ b/lib/PublicInbox/IMAP.pm
@@ -351,7 +351,7 @@ 	\"+ idling\r\n"
 }
 
 sub stop_idle ($$) {
-	my ($self, $ibx);
+	my ($self, $ibx) = @_;
 	my $sock = $self->{sock} or return;
 	my $fd = fileno($sock);
 	delete $IDLERS->{$fd};