diff --git a/Doc/library/codecs.rst b/Doc/library/codecs.rst
index 61da3ed..d283ede 100644
--- a/Doc/library/codecs.rst
+++ b/Doc/library/codecs.rst
@@ -66,7 +66,7 @@
       ``factory(stream, errors='strict')``
 
    The factory functions must return objects providing the interfaces defined by
-   the base classes :class:`StreamWriter` and :class:`StreamReader`, respectively.
+   the base classes :class:`StreamReader` and :class:`StreamWriter`, respectively.
    Stream codecs can maintain state.
 
    Possible values for errors are