diff --git a/stdlib/2and3/socket.pyi b/stdlib/2and3/socket.pyi
index 0dc4cb94c..b787dd868 100644
--- a/stdlib/2and3/socket.pyi
+++ b/stdlib/2and3/socket.pyi
@@ -539,7 +539,10 @@ class socket:
     def gettimeout(self) -> float: ...
     def ioctl(self, control: object,
               option: Tuple[int, int, int]) -> None: ...
-    def listen(self, backlog: int) -> None: ...
+    if sys.version_info < (3, 5):
+        def listen(self, backlog: int) -> None: ...
+    else:
+        def listen(self, backlog: int = ...) -> None: ...
     # TODO the return value may be BinaryIO or TextIO, depending on mode
     def makefile(self, mode: str = ..., buffering: int = ...,
                  encoding: str = ..., errors: str = ...,