lib/PublicInbox/LEI.pm | 1 +

diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index 09eac58c8a8592a90d4bad778001d3bef2489da8..effc6c52ba28804ab668bb576c09a18e73b0ebe2 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -24,6 +24,7 @@ use PublicInbox::DS qw(now dwaitpid);
 use PublicInbox::Spawn qw(spawn popen_rd);
 use PublicInbox::OnDestroy;
 use Text::Wrap qw(wrap);
+use Time::HiRes qw(stat); # ctime comparisons for config cache
 use File::Path qw(mkpath);
 use File::Spec;
 our $quit = \&CORE::exit;