diff --git a/src/dependency_injector/_cwiring.pyi b/src/dependency_injector/_cwiring.pyi
new file mode 100644
index 00000000..e7ff12f4
--- /dev/null
+++ b/src/dependency_injector/_cwiring.pyi
@@ -0,0 +1,23 @@
+from typing import Any, Awaitable, Callable, Dict, Tuple, TypeVar
+
+from .providers import Provider
+
+T = TypeVar("T")
+
+def _sync_inject(
+    fn: Callable[..., T],
+    args: Tuple[Any, ...],
+    kwargs: Dict[str, Any],
+    injections: Dict[str, Provider[Any]],
+    closings: Dict[str, Provider[Any]],
+    /,
+) -> T: ...
+async def _async_inject(
+    fn: Callable[..., Awaitable[T]],
+    args: Tuple[Any, ...],
+    kwargs: Dict[str, Any],
+    injections: Dict[str, Provider[Any]],
+    closings: Dict[str, Provider[Any]],
+    /,
+) -> T: ...
+def _isawaitable(instance: Any) -> bool: ...