lib/PublicInbox/LeiSearch.pm | 2 ++

diff --git a/lib/PublicInbox/LeiSearch.pm b/lib/PublicInbox/LeiSearch.pm
index 1fb38da1d7aaac22d7f9475cb342a4cdb4e0b3e4..d0ca13f0aa11e444b2fc5292b927dbc777b0a677 100644
--- a/lib/PublicInbox/LeiSearch.pm
+++ b/lib/PublicInbox/LeiSearch.pm
@@ -175,6 +175,8 @@
 sub qparse_new {
 	my ($self) = @_;
 	my $qp = $self->SUPER::qparse_new; # PublicInbox::Search
+	$self->{qp_flags} |= PublicInbox::Search::FLAG_PHRASE() |
+				PublicInbox::Search::FLAG_PURE_NOT();
 	$qp->add_boolean_prefix('kw', 'K');
 	$qp->add_boolean_prefix('L', 'L');
 	$qp