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

diff --git a/lib/PublicInbox/WWW.pm b/lib/PublicInbox/WWW.pm
index e211cd6d5fcf45091b94b9b75fad8c9d963642bf..d26b69c00050879d3fb41949669c310c4417b510 100644
--- a/lib/PublicInbox/WWW.pm
+++ b/lib/PublicInbox/WWW.pm
@@ -45,7 +45,8 @@ 		pi_config => $self->{pi_config} };
 
 	# we don't care about multi-value
 	my %qp = map {
-		(split('=', $_, 2))
+		my ($k, $v) = split('=', $_, 2);
+		($k, $v)
 	} split(/[&;]/, uri_unescape($env->{QUERY_STRING}));
 	$ctx->{qp} = \%qp;