lib/PublicInbox/SearchIdx.pm | 19 ++++++++++++-------

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index aeb363e03d1d57a7ccd3cc7c1ae408cf98d91a05..74f9267ec0a8460e3a2eac40b2cb51967de78abd 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -752,18 +752,23 @@
 sub begin_txn_lazy {
 	my ($self) = @_;
 	return if $self->{txn};
-	my $xdb = $self->{xdb} || $self->_xdb_acquire;
-	$self->{over}->begin_lazy if $self->{over};
-	$xdb->begin_transaction;
-	$self->{txn} = 1;
-	$xdb;
+
+	$self->{-inbox}->with_umask(sub {
+		my $xdb = $self->{xdb} || $self->_xdb_acquire;
+		$self->{over}->begin_lazy if $self->{over};
+		$xdb->begin_transaction;
+		$self->{txn} = 1;
+		$xdb;
+	});
 }
 
 sub commit_txn_lazy {
 	my ($self) = @_;
 	delete $self->{txn} or return;
-	$self->{xdb}->commit_transaction;
-	$self->{over}->commit_lazy if $self->{over};
+	$self->{-inbox}->with_umask(sub {
+		$self->{xdb}->commit_transaction;
+		$self->{over}->commit_lazy if $self->{over};
+	});
 }
 
 sub worker_done {