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-rw-r--r--lib/PublicInbox/LeiTag.pm4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/PublicInbox/LeiTag.pm b/lib/PublicInbox/LeiTag.pm
index 2dc59f70..8ce96a10 100644
--- a/lib/PublicInbox/LeiTag.pm
+++ b/lib/PublicInbox/LeiTag.pm
@@ -27,8 +27,8 @@ sub pmdir_cb { # called via wq_io_do from LeiPmdir->each_mdir_fn
 
 sub lei_tag { # the "lei tag" method
         my ($lei, @argv) = @_;
-        my $sto = $lei->_lei_store(1);
-        $sto->write_prepare($lei);
+        $lei->{opt}->{'in-format'} //= 'eml' if $lei->{opt}->{stdin};
+        my $sto = $lei->_lei_store(1)->write_prepare($lei);
         my $self = bless {}, __PACKAGE__;
         $lei->ale; # refresh and prepare
         my $vmd_mod = $self->vmd_mod_extract(\@argv);