diff --git a/stdlib/2.7/io.pyi b/stdlib/2.7/io.pyi
index 68a1b2b6f..a39cd91e1 100644
--- a/stdlib/2.7/io.pyi
+++ b/stdlib/2.7/io.pyi
@@ -41,6 +41,7 @@ class BytesIO(BinaryIO):
     def read1(self) -> str: ...
 
     def __iter__(self) -> Iterator[str]: ...
+    def next(self) -> str: ...
     def __enter__(self) -> 'BytesIO': ...
     def __exit__(self, type, value, traceback) -> bool: ...