diff --git a/include/boost/iterator/detail/facade_iterator_category.hpp b/include/boost/iterator/detail/facade_iterator_category.hpp
old mode 100755
new mode 100644
index 2c4771d..1f8e525
--- a/include/boost/iterator/detail/facade_iterator_category.hpp
+++ b/include/boost/iterator/detail/facade_iterator_category.hpp
@@ -73,15 +73,8 @@ struct iterator_writability_disabled
 // Convert an iterator_facade's traversal category, Value parameter,
 // and ::reference type to an appropriate old-style category.
 //
-// If writability has been disabled per the above metafunction, the
-// result will not be convertible to output_iterator_tag.
-//
-// Otherwise, if Traversal == single_pass_traversal_tag, the following
-// conditions will result in a tag that is convertible both to
-// input_iterator_tag and output_iterator_tag:
-//
-//    1. Reference is a reference to non-const
-//    2. Reference is not a reference and is convertible to Value
+// Due to changeset 21683, this now never results in a category convertible
+// to output_iterator_tag.
 //
 template <class Traversal, class ValueParam, class Reference>
 struct iterator_facade_default_category