t/net_reader-imap.t | 1 +

diff --git a/t/net_reader-imap.t b/t/net_reader-imap.t
index 694b5a37ad5c1153215e190b094e03974a30c786..adcd69314b9c646421a158bc2960f6fdfe93c0a9 100644
--- a/t/net_reader-imap.t
+++ b/t/net_reader-imap.t
@@ -4,6 +4,7 @@ # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 use strict; use v5.10.1; use PublicInbox::TestCommon;
 require_git 2.6;
 require_mods(qw(DBD::SQLite Search::Xapian Mail::IMAPClient));
+use PublicInbox::Config;
 my ($tmpdir, $for_destroy) = tmpdir;
 my ($ro_home, $cfg_path) = setup_public_inboxes;
 my $cmd = [ '-imapd', '-W0', "--stdout=$tmpdir/1", "--stderr=$tmpdir/2" ];