diff --git a/tools/make_disc_trees.pl b/tools/make_disc_trees.pl
index 0d266ef5..b87b693e 100755
--- a/tools/make_disc_trees.pl
+++ b/tools/make_disc_trees.pl
@@ -935,6 +935,7 @@ sub msg_ap {
     if (!$log_opened) {
         open(AP_LOG, ">> $tdir/$codename/add_packages.log")
             || die "Can't write in $tdir/add_packages.log!\n";
+	$log_opened = 1;
     }
     print AP_LOG @_;
 }