diff --git a/Doc/library/2to3.rst b/Doc/library/2to3.rst
index 1092e6b6207..6473861883f 100644
--- a/Doc/library/2to3.rst
+++ b/Doc/library/2to3.rst
@@ -392,7 +392,7 @@ and off individually.  They are described here in more detail.
    Replaces use of the :class:`set` constructor with set literals.  This fixer
    is optional.
 
-.. 2to3fixer:: standard_error
+.. 2to3fixer:: standarderror
 
    Renames :exc:`StandardError` to :exc:`Exception`.