diff --git a/specification/resources/kubernetes/models/cluster.yml b/specification/resources/kubernetes/models/cluster.yml
index 508703136..8290bdfa0 100644
--- a/specification/resources/kubernetes/models/cluster.yml
+++ b/specification/resources/kubernetes/models/cluster.yml
@@ -143,11 +143,13 @@ properties:
 
   ha:
     type: boolean
-    default: false
     example: true
     description: A boolean value indicating whether the control plane
       is run in a highly available configuration in the cluster. Highly available
       control planes incur less downtime. The property cannot be disabled.
+      When omitted on create, the default is version-dependent; for DOKS
+      1.36.0 and later, the default is true; for earlier versions, the
+      default is false.
 
   registry_enabled:
     type: boolean
diff --git a/specification/resources/kubernetes/models/cluster_read.yml b/specification/resources/kubernetes/models/cluster_read.yml
index 05bd59bfb..57025d447 100644
--- a/specification/resources/kubernetes/models/cluster_read.yml
+++ b/specification/resources/kubernetes/models/cluster_read.yml
@@ -148,6 +148,9 @@ properties:
     description: A boolean value indicating whether the control plane
       is run in a highly available configuration in the cluster. Highly available
       control planes incur less downtime. The property cannot be disabled.
+      When omitted on create, the default is version-dependent; for DOKS
+      1.36.0 and later, the default is true; for earlier versions, the
+      default is false.
 
   registry_enabled:
     type: boolean
diff --git a/specification/resources/kubernetes/models/cluster_update.yml b/specification/resources/kubernetes/models/cluster_update.yml
index 30aca3936..86a16a6ba 100644
--- a/specification/resources/kubernetes/models/cluster_update.yml
+++ b/specification/resources/kubernetes/models/cluster_update.yml
@@ -39,11 +39,13 @@ properties:
 
   ha:
     type: boolean
-    default: false
     example: true
     description: A boolean value indicating whether the control plane
       is run in a highly available configuration in the cluster. Highly available
       control planes incur less downtime. The property cannot be disabled.
+      When omitted on create, the default is version-dependent; for DOKS
+      1.36.0 and later, the default is true; for earlier versions, the
+      default is false.
 
   control_plane_firewall:
     $ref: 'control_plane_firewall.yml'