diff --git a/openbb_platform/core/openbb_core/app/static/package_builder/reference_generator.py b/openbb_platform/core/openbb_core/app/static/package_builder/reference_generator.py
index cc0fc7bfd0f..283a9d7f121 100644
--- a/openbb_platform/core/openbb_core/app/static/package_builder/reference_generator.py
+++ b/openbb_platform/core/openbb_core/app/static/package_builder/reference_generator.py
@@ -602,7 +602,7 @@ class ReferenceGenerator:
                     else str(param_type)
                 )
                 description = default.description  # type: ignore
-                json_extra = default.json_schema_extra  # type: ignore
+                json_extra = default.json_schema_extra or {}  # type: ignore
                 has_default = hasattr(default, "default") and default.default not in [
                     Parameter.empty,
                     PydanticUndefined,
diff --git a/openbb_platform/core/tests/app/static/package_builder/test_docstring_generator_helpers.py b/openbb_platform/core/tests/app/static/package_builder/test_docstring_generator_helpers.py
index 980fabc78ea..ff77867c589 100644
--- a/openbb_platform/core/tests/app/static/package_builder/test_docstring_generator_helpers.py
+++ b/openbb_platform/core/tests/app/static/package_builder/test_docstring_generator_helpers.py
@@ -1961,6 +1961,7 @@ def test_literal_choices_reads_bare_optional_and_non_literal_types():
         ("list[typing.Optional[str]]", "list[str | None]"),
         ("<class 'str'>", "str"),
         ("datetime.date", "date"),
+        ("typing.Optional[str", "Optional[str"),
         # Literal still collapses to str; duplicates still collapse
         ("typing.Optional[typing.Literal['a', 'b']]", "str | None"),
         ("typing.Union[typing.Literal['a'], typing.Literal['b']]", "str"),