lib/PublicInbox/Config.pm | 2 +-

diff --git a/lib/PublicInbox/Config.pm b/lib/PublicInbox/Config.pm
index 28b5bdb5f895547909694f4c4916b9d7297f439e..f6275cdd24663d2f5b3f8235d7e188a04863b923 100644
--- a/lib/PublicInbox/Config.pm
+++ b/lib/PublicInbox/Config.pm
@@ -111,7 +111,7 @@ 	my $cmd = join(' ', @cmd);
 	my $fh = popen_rd(\@cmd) or die "popen_rd failed for $file: $!\n";
 	my %rv;
 	local $/ = "\n";
-	foreach my $line (<$fh>) {
+	while (defined(my $line = <$fh>)) {
 		chomp $line;
 		my ($k, $v) = split(/=/, $line, 2);
 		my $cur = $rv{$k};