diff --git a/defaults/maas.yml b/defaults/maas.yml
index df932c8..795d4b0 100644
--- a/defaults/maas.yml
+++ b/defaults/maas.yml
@@ -1,5 +1,6 @@
 parameters:
   _param:
+    maas_postgresql_server: ${_param:postgresql_server}
     default_local_mirrror_content:
       maas_mirror_image_sections:
         bootloaders: