lib/PublicInbox/GitHTTPBackend.pm | 2 +-

diff --git a/lib/PublicInbox/GitHTTPBackend.pm b/lib/PublicInbox/GitHTTPBackend.pm
index 97834de4e97d00cb8b4e8ba4bd43faf058dfe4ee..70990ebc5a6a8fa3f76ac433d811f888cc264a58 100644
--- a/lib/PublicInbox/GitHTTPBackend.pm
+++ b/lib/PublicInbox/GitHTTPBackend.pm
@@ -42,7 +42,7 @@
 sub serve {
 	my ($cgi, $git, $path) = @_;
 
-	my $service = $cgi->param('service') || '';
+	my $service = $cgi->query_parameters->get('service') || '';
 	if ($service =~ /\Agit-\w+-pack\z/ || $path =~ /\Agit-\w+-pack\z/) {
 		my $ok = serve_smart($cgi, $git, $path);
 		return $ok if $ok;