diff --git a/environments/undercloud.yaml b/environments/undercloud.yaml
index dbf586237c..6ecdee8039 100644
--- a/environments/undercloud.yaml
+++ b/environments/undercloud.yaml
@@ -1,7 +1,3 @@
-parameter_merge_strategies:
-  default: overwrite
-  UndercloudExtraConfig: deep_merge
-
 resource_registry:
   OS::TripleO::Services::Tmpwatch: ../deployment/logrotate/tmpwatch-install.yaml
   OS::TripleO::Network::Ports::RedisVipPort: ../network/ports/noop.yaml