diff --git a/server_addon/maya/client/ayon_maya/plugins/create/create_animation_pointcache.py b/server_addon/maya/client/ayon_maya/plugins/create/create_animation_pointcache.py
index ea4cdb57fe..521dc1a681 100644
--- a/server_addon/maya/client/ayon_maya/plugins/create/create_animation_pointcache.py
+++ b/server_addon/maya/client/ayon_maya/plugins/create/create_animation_pointcache.py
@@ -99,8 +99,8 @@ class CreateAnimation(plugin.MayaHiddenCreator):
         return node_data
 
     def get_instance_attr_defs(self):
-        defs = super(CreateAnimation, self).get_instance_attr_defs()
-        defs += _get_animation_attr_defs(self)
+        defs = list(super().get_instance_attr_defs())
+        defs.extend(_get_animation_attr_defs(self))
         return defs
 
 
@@ -123,8 +123,8 @@ class CreatePointCache(plugin.MayaCreator):
         return node_data
 
     def get_instance_attr_defs(self):
-        defs = super(CreatePointCache, self).get_instance_attr_defs()
-        defs += _get_animation_attr_defs(self)
+        defs = list(super().get_instance_attr_defs())
+        defs.extend(_get_animation_attr_defs(self))
         return defs
 
     def create(self, product_name, instance_data, pre_create_data):