script/public-inbox-edit | 3 ++-

diff --git a/script/public-inbox-edit b/script/public-inbox-edit
index 24b7ed8b2d220bb7a1bc090c7228e2a7fb608e21..43ce9900eff3aa06f0d15fc35937adcbc2795d1b 100755
--- a/script/public-inbox-edit
+++ b/script/public-inbox-edit
@@ -130,7 +130,8 @@
 	my $tmp = $$old_raw;
 	if (!$opt->{raw}) {
 		my $oid = $smsg->{blob};
-		print $edit_fh "From mboxrd\@$oid Thu Jan  1 00:00:00 1970\n";
+		print $edit_fh "From mboxrd\@$oid Thu Jan  1 00:00:00 1970\n"
+			or die "failed to write From_ line: $!";
 		$tmp =~ s/^(>*From )/>$1/gm;
 	}
 	print $edit_fh $tmp or