diff --git a/.generator/schemas/v2/openapi.yaml b/.generator/schemas/v2/openapi.yaml
index 81ee332d55..bd320edb5e 100644
--- a/.generator/schemas/v2/openapi.yaml
+++ b/.generator/schemas/v2/openapi.yaml
@@ -56723,8 +56723,9 @@ components:
       description: The definition of a configurable parameter on a control or mitigation.
       properties:
         default_value:
-          description: The default value of the parameter. The JSON type depends on the parameter's `type`.
+          description: The default value of the parameter. The JSON type depends on the parameter's `type`. `null` when the parameter has no default.
           example: 30
+          nullable: true
         description:
           description: A human-readable description of the parameter.
           example: "Number of days of inactivity before an API key is considered unused."
diff --git a/src/datadog_api_client/v2/model/governance_control_parameter_definition.py b/src/datadog_api_client/v2/model/governance_control_parameter_definition.py
index 38dac7a043..58feb0d43c 100644
--- a/src/datadog_api_client/v2/model/governance_control_parameter_definition.py
+++ b/src/datadog_api_client/v2/model/governance_control_parameter_definition.py
@@ -25,18 +25,7 @@ def openapi_types(_):
         from datadog_api_client.v2.model.governance_control_supported_value import GovernanceControlSupportedValue
 
         return {
-            "default_value": (
-                bool,
-                date,
-                datetime,
-                dict,
-                float,
-                int,
-                list,
-                str,
-                UUID,
-                none_type,
-            ),
+            "default_value": (bool, date, datetime, dict, float, int, list, str, UUID, none_type, none_type),
             "description": (str,),
             "display_name": (str,),
             "name": (str,),
@@ -57,7 +46,7 @@ def openapi_types(_):
 
     def __init__(
         self_,
-        default_value: Any,
+        default_value: Union[Any, none_type],
         description: str,
         display_name: str,
         name: str,
@@ -69,8 +58,8 @@ def __init__(
         """
         The definition of a configurable parameter on a control or mitigation.
 
-        :param default_value: The default value of the parameter. The JSON type depends on the parameter's ``type``.
-        :type default_value: bool, date, datetime, dict, float, int, list, str, UUID, none_type
+        :param default_value: The default value of the parameter. The JSON type depends on the parameter's ``type``. ``null`` when the parameter has no default.
+        :type default_value: bool, date, datetime, dict, float, int, list, str, UUID, none_type, none_type
 
         :param description: A human-readable description of the parameter.
         :type description: str