diff --git a/Doc/library/codecs.rst b/Doc/library/codecs.rst
index 2f7497c0c49..3386208d5ef 100644
--- a/Doc/library/codecs.rst
+++ b/Doc/library/codecs.rst
@@ -691,8 +691,9 @@ compatible with the Python codec registry.
 
    .. method:: writelines(list)
 
-      Writes the concatenated list of strings to the stream (possibly by reusing
-      the :meth:`write` method). The standard bytes-to-bytes codecs
+      Writes the concatenated iterable of strings to the stream (possibly by reusing
+      the :meth:`write` method). Infinite or
+      very large iterables are not supported. The standard bytes-to-bytes codecs
       do not support this method.