diff --git a/tractor/_supervise.py b/tractor/_supervise.py
index 1b46433..62b7a86 100644
--- a/tractor/_supervise.py
+++ b/tractor/_supervise.py
@@ -83,7 +83,7 @@ class ActorNursery:
         actor: Actor,
         ria_nursery: trio.Nursery,
         da_nursery: trio.Nursery,
-        errors: dict[tuple[str, str], Exception],
+        errors: dict[tuple[str, str], BaseException],
     ) -> None:
         # self.supervisor = supervisor  # TODO
         self._actor: Actor = actor