diff --git a/flytekit/core/type_engine.py b/flytekit/core/type_engine.py
index bf31c30450..d76a9c3da1 100644
--- a/flytekit/core/type_engine.py
+++ b/flytekit/core/type_engine.py
@@ -985,10 +985,10 @@ def to_literal(self, ctx: FlyteContext, python_val: T, python_type: Type[T], exp
         if type(python_val) != list:
             raise TypeTransformerFailedError("Expected a list")
 
-        if self.is_batchable(python_type):
+        if ListTransformer.is_batchable(python_type):
             batchSize = len(python_val)  # default batch size
             # parse annotated to get the number of items saved in a pickle file.
-            if get_origin(python_type) is Annotated:
+            if get_origin(python_type) is Annotated and type(get_args(python_type)[1]) == int:
                 batchSize = get_args(python_type)[1]
             lit_list = [TypeEngine.to_literal(ctx, python_val[i : i + batchSize], FlytePickle, expected.collection_type) for i in range(0, len(python_val), batchSize)]  # type: ignore
         else: