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

diff --git a/lib/PublicInbox/Spawn.pm b/lib/PublicInbox/Spawn.pm
index ba6e73675fe4a50483b6f1606e917ea702aa4511..c85b68003ac0835bc89e2f8781fa9f14e62450d0 100644
--- a/lib/PublicInbox/Spawn.pm
+++ b/lib/PublicInbox/Spawn.pm
@@ -13,8 +13,7 @@ # Perl routines.
 
 package PublicInbox::Spawn;
 use strict;
-use warnings;
-use base qw(Exporter);
+use parent qw(Exporter);
 use Symbol qw(gensym);
 use PublicInbox::ProcessPipe;
 our @EXPORT_OK = qw/which spawn popen_rd/;