diff --git a/modules/openapi-generator/src/main/resources/python/python-experimental/model_utils.mustache b/modules/openapi-generator/src/main/resources/python/python-experimental/model_utils.mustache
index a0d2dd2e5b39..c9a527ab6fe4 100644
--- a/modules/openapi-generator/src/main/resources/python/python-experimental/model_utils.mustache
+++ b/modules/openapi-generator/src/main/resources/python/python-experimental/model_utils.mustache
@@ -779,7 +779,7 @@ def get_discriminator_class(model_class,
             model_class._composed_schemas.get('allOf', ())
         for cls in composed_children:
             # Check if the schema has inherited discriminators.
-            if cls.discriminator is not None:
+            if hasattr(cls, 'discriminator') and cls.discriminator is not None:
                 used_model_class = get_discriminator_class(
                                     cls, discr_name, discr_value, cls_visited)
                 if used_model_class is not None:
diff --git a/samples/client/petstore/python-experimental/petstore_api/model_utils.py b/samples/client/petstore/python-experimental/petstore_api/model_utils.py
index fdf1feccf192..91225e19fcb6 100644
--- a/samples/client/petstore/python-experimental/petstore_api/model_utils.py
+++ b/samples/client/petstore/python-experimental/petstore_api/model_utils.py
@@ -1046,7 +1046,7 @@ def get_discriminator_class(model_class,
             model_class._composed_schemas.get('allOf', ())
         for cls in composed_children:
             # Check if the schema has inherited discriminators.
-            if cls.discriminator is not None:
+            if hasattr(cls, 'discriminator') and cls.discriminator is not None:
                 used_model_class = get_discriminator_class(
                                     cls, discr_name, discr_value, cls_visited)
                 if used_model_class is not None:
diff --git a/samples/openapi3/client/petstore/python-experimental/petstore_api/model_utils.py b/samples/openapi3/client/petstore/python-experimental/petstore_api/model_utils.py
index fdf1feccf192..91225e19fcb6 100644
--- a/samples/openapi3/client/petstore/python-experimental/petstore_api/model_utils.py
+++ b/samples/openapi3/client/petstore/python-experimental/petstore_api/model_utils.py
@@ -1046,7 +1046,7 @@ def get_discriminator_class(model_class,
             model_class._composed_schemas.get('allOf', ())
         for cls in composed_children:
             # Check if the schema has inherited discriminators.
-            if cls.discriminator is not None:
+            if hasattr(cls, 'discriminator') and cls.discriminator is not None:
                 used_model_class = get_discriminator_class(
                                     cls, discr_name, discr_value, cls_visited)
                 if used_model_class is not None: