lib/PublicInbox/OverIdx.pm | 4 ++--

diff --git a/lib/PublicInbox/OverIdx.pm b/lib/PublicInbox/OverIdx.pm
index fcb450794fc2c05bffab9a49a330b686d22f1913..5821c562b814de635862db755db1c7a42f9954e8 100644
--- a/lib/PublicInbox/OverIdx.pm
+++ b/lib/PublicInbox/OverIdx.pm
@@ -12,7 +12,7 @@ use strict;
 use warnings;
 use base qw(PublicInbox::Over);
 use IO::Handle;
-use DBI;
+use DBI qw(:sql_types); # SQL_BLOB
 use PublicInbox::MID qw/id_compress mids_for_index references/;
 use PublicInbox::Smsg qw(subject_normalized);
 use Compress::Zlib qw(compress);
@@ -337,7 +337,7 @@
 	my $n = 0;
 	my @v = ($num, $tid, $sid, $ts, $ds);
 	foreach (@v) { $sth->bind_param(++$n, $_) }
-	$sth->bind_param(++$n, $ddd);
+	$sth->bind_param(++$n, $ddd, SQL_BLOB);
 	$sth->execute;
 	$sth = $dbh->prepare_cached(<<'');
 INSERT INTO id2num (id, num) VALUES (?,?)