diff --git a/src/basedtyping/transformer.py b/src/basedtyping/transformer.py
index 292eb84..82887b1 100644
--- a/src/basedtyping/transformer.py
+++ b/src/basedtyping/transformer.py
@@ -230,11 +230,9 @@ def eval_type_based(
     *,
     string_literals: bool,
 ) -> object:
-    """
-    Like `typing._eval_type`, but lets older Python versions use newer typing features.
-    Specifically, this transforms `X | Y` into `typing.Union[X, Y]`
-    and `list[X]` into `typing.List[X]` etc. (for all the types made generic in PEP 585)
-    if the original syntax is not supported in the current Python version.
+    """Like `typing._eval_type`, but supports based typing features.
+    Specifically, this transforms `1 | 2` into `typing.Union[Literal[1], Literal[2]]`
+    and `(int) -> str` into `typing.Callable[[int], str]` etc.
     """
     tree: ast.AST
     try: