diff --git a/stdlib/2.7/csv.pyi b/stdlib/2.7/csv.pyi
index ce330105e..c91d3305e 100644
--- a/stdlib/2.7/csv.pyi
+++ b/stdlib/2.7/csv.pyi
@@ -2,27 +2,22 @@
 #
 # NOTE: Based on a dynamically typed stub automatically generated by stubgen.
 
-from abc import ABCMeta, abstractmethod
 from typing import Any, Dict, Iterable, List, Sequence, Union
 
-# Public interface of _csv.reader
-class Reader(Iterable[List[str]], metaclass=ABCMeta):
+# Public interface of _csv.reader's return type
+class _Reader(Iterable[List[str]]):
     dialect = ...  # type: Dialect
     line_num = ...  # type: int
 
-    @abstractmethod
     def next(self) -> List[str]: ...
 
 _Row = Sequence[Union[str, int]]
 
-# Public interface of _csv.writer
-class Writer(metaclass=ABCMeta):
+# Public interface of _csv.writer's return type
+class _Writer:
     dialect = ...  # type: Dialect
 
-    @abstractmethod
     def writerow(self, row: _Row) -> None: ...
-
-    @abstractmethod
     def writerows(self, rows: Iterable[_Row]) -> None: ...
 
 QUOTE_ALL = ...  # type: int
@@ -34,8 +29,8 @@ class Error(Exception): ...
 
 _Dialect = Union[str, Dialect]
 
-def writer(csvfile: Any, dialect: _Dialect = ..., **fmtparams) -> Writer: ...
-def reader(csvfile: Iterable[str], dialect: _Dialect = ..., **fmtparams) -> Reader: ...
+def writer(csvfile: Any, dialect: _Dialect = ..., **fmtparams) -> _Writer: ...
+def reader(csvfile: Iterable[str], dialect: _Dialect = ..., **fmtparams) -> _Reader: ...
 def register_dialect(name, dialect=..., **fmtparams): ...
 def unregister_dialect(name): ...
 def get_dialect(name: str) -> Dialect: ...