diff --git a/stdlib/3.4/asyncio/events.pyi b/stdlib/3.4/asyncio/events.pyi
index e20a02318..557646b0d 100644
--- a/stdlib/3.4/asyncio/events.pyi
+++ b/stdlib/3.4/asyncio/events.pyi
@@ -194,7 +194,7 @@ class AbstractEventLoopPolicy(metaclass=ABCMeta):
     @abstractmethod
     def get_event_loop(self) -> AbstractEventLoop: ...
     @abstractmethod
-    def set_event_loop(self, loop: AbstractEventLoop): ...
+    def set_event_loop(self, loop: AbstractEventLoop) -> None: ...
     @abstractmethod
     def new_event_loop(self) -> AbstractEventLoop: ...
     # Child processes handling (Unix only).
@@ -206,7 +206,7 @@ class AbstractEventLoopPolicy(metaclass=ABCMeta):
 class BaseDefaultEventLoopPolicy(AbstractEventLoopPolicy):
     def __init__(self) -> None: ...
     def get_event_loop(self) -> AbstractEventLoop: ...
-    def set_event_loop(self, loop: AbstractEventLoop): ...
+    def set_event_loop(self, loop: AbstractEventLoop) -> None: ...
     def new_event_loop(self) -> AbstractEventLoop: ...
 
 def get_event_loop_policy() -> AbstractEventLoopPolicy: ...