diff --git a/rootfs/usr/local/etc/docker/init.d/02-named.sh b/rootfs/usr/local/etc/docker/init.d/02-named.sh
index 97bcf90..6edb0a1 100755
--- a/rootfs/usr/local/etc/docker/init.d/02-named.sh
+++ b/rootfs/usr/local/etc/docker/init.d/02-named.sh
@@ -367,7 +367,8 @@ EOF
       domain_name="$(basename "${dns_file%.*}")"
       main_server="$(grep -sh 'masters ' "$dns_file" | sed 's/^[ \t]*//' || echo "masters { $DNS_REMOTE_SERVER:-$DNS_SERVER_PRIMARY"); };"
       if [ -n "$domain_name" ]; then
-        cat <<EOF | sed '/masters.*/d' >>"$TMP_DIR/$file_name"
+        echo $domain_name
+        cat <<EOF | sed '/masters.*/d' >"$TMP_DIR/$file_name"
 #  ********** begin $domain_name **********
 zone "$domain_name" {
     type slave;