diff --git a/stdlib/2and3/logging/__init__.pyi b/stdlib/2and3/logging/__init__.pyi
index 6eb6863bd..c0dec0448 100644
--- a/stdlib/2and3/logging/__init__.pyi
+++ b/stdlib/2and3/logging/__init__.pyi
@@ -143,7 +143,7 @@ class Handler(Filterer):
     def close(self) -> None: ...
     def handle(self, record: 'LogRecord') -> None: ...
     def handleError(self, record: 'LogRecord') -> None: ...
-    def format(self, record: 'LogRecord') -> None: ...
+    def format(self, record: 'LogRecord') -> str: ...
     def emit(self, record: 'LogRecord') -> None: ...