diff --git a/stdlib/2.7/io.pyi b/stdlib/2.7/io.pyi
index a39cd91e1..376346333 100644
--- a/stdlib/2.7/io.pyi
+++ b/stdlib/2.7/io.pyi
@@ -68,6 +68,7 @@ class StringIO(TextIO):
     def getvalue(self) -> unicode: ...
 
     def __iter__(self) -> Iterator[unicode]: ...
+    def next(self) -> unicode: ...
     def __enter__(self) -> 'StringIO': ...
     def __exit__(self, type, value, traceback) -> bool: ...
 
@@ -96,6 +97,7 @@ class TextIOWrapper(TextIO):
     def writelines(self, lines: Iterable[unicode]) -> None: ...
 
     def __iter__(self) -> Iterator[unicode]: ...
+    def next(self) -> unicode: ...
     def __enter__(self) -> StringIO: ...
     def __exit__(self, type, value, traceback) -> bool: ...