diff --git a/environments/docker.yaml b/environments/docker.yaml
index a7e2504cc7..c03d8511bc 100644
--- a/environments/docker.yaml
+++ b/environments/docker.yaml
@@ -5,8 +5,6 @@ resource_registry:
 
 parameter_defaults:
   NovaImage: atomic-image
-
-parameter_defaults:
   # Defaults to 'tripleoupstream'.  Specify a local docker registry
   # Example: 192.0.2.1:8787/tripleoupstream
   DockerNamespace: tripleoupstream