diff --git a/packages/@jsii/python-runtime/src/jsii/_kernel/types.py b/packages/@jsii/python-runtime/src/jsii/_kernel/types.py
index 665bdbb9d3..3f43dac5d3 100644
--- a/packages/@jsii/python-runtime/src/jsii/_kernel/types.py
+++ b/packages/@jsii/python-runtime/src/jsii/_kernel/types.py
@@ -54,7 +54,7 @@ class CreateRequest:
     fqn: str
     args: List[Any] = attr.Factory(list)
     overrides: List[Override] = attr.Factory(list)
-    interfaces: Optional[List[str]] = attr.Factory(Optional[list])
+    interfaces: Optional[List[str]] = None
 
 
 @attr.s(auto_attribs=True, frozen=True, slots=True)