diff --git a/docker/mariadb/Dockerfile.j2 b/docker/mariadb/Dockerfile.j2
index a3214d4..2bd8419 100644
--- a/docker/mariadb/Dockerfile.j2
+++ b/docker/mariadb/Dockerfile.j2
@@ -1,4 +1,4 @@
-FROM {{ namespace }}/base-tools:{{ tag }}
+FROM {{ image_spec("base-tools") }}
 MAINTAINER {{ maintainer }}
 
 COPY sources.list.debian /etc/apt/sources.list.d/mariadb.list