diff --git a/etgtools/pi_generator.py b/etgtools/pi_generator.py
index 6aad3ce4..e1c140ca 100644
--- a/etgtools/pi_generator.py
+++ b/etgtools/pi_generator.py
@@ -80,9 +80,10 @@ header_pyi = """\
 
 typing_imports = """\
 from __future__ import annotations
-from collections.abc import Callable
 from enum import IntEnum, IntFlag, auto
-from typing import Any, overload, TypeAlias, TypeVar, ParamSpec, Generic, Union, Optional, List, Tuple
+from typing import (Any, overload, TypeAlias, TypeVar, ParamSpec, Generic,
+    Union, Optional, List, Tuple, Callable
+)
 
 """