lib/PublicInbox/Search.pm | 1 +

diff --git a/lib/PublicInbox/Search.pm b/lib/PublicInbox/Search.pm
index 7785d48317ac9c9038d9e4ce33a3443b85179a31..803914b02f596d45b6d03087180b4afb14f3f9b3 100644
--- a/lib/PublicInbox/Search.pm
+++ b/lib/PublicInbox/Search.pm
@@ -396,6 +396,7 @@
 	# for IMAP, undocumented for WWW and may be split off go away
 	$cb->($qp, $NVRP->new(BYTES, 'bytes:'));
 	$cb->($qp, $NVRP->new(TS, 'ts:'));
+	$cb->($qp, $NVRP->new(UID, 'uid:'));
 
 	while (my ($name, $prefix) = each %bool_pfx_external) {
 		$qp->add_boolean_prefix($name, $_) foreach split(/ /, $prefix);