diff --git a/docker-compose.master.yml b/docker-compose.master.yml
index 2b51c35..3125643 100644
--- a/docker-compose.master.yml
+++ b/docker-compose.master.yml
@@ -85,6 +85,7 @@ services:
       DB_PASSWORD: ${MARIADB_PASSWORD}
       PDNS_API_URL: http://pdns:8081
       PDNS_API_KEY: ${PDNS_API_KEY}
+      PDNS_NS: ${PDNS_NS}
     depends_on:
       - pdns
       - mariadb