diff --git a/source/iterators.tex b/source/iterators.tex
index 5d46f37e64..31bda1bfe8 100644
--- a/source/iterators.tex
+++ b/source/iterators.tex
@@ -539,7 +539,7 @@
 \defn{value type}
 of the iterator.
 An output iterator \tcode{i} has a non-empty set of types that are
-\libconcept{indirectly_writable} to the iterator;
+\defn{writable} to the iterator;
 for each such type \tcode{T}, the expression \tcode{*i = o}
 is valid where \tcode{o} is a value of type \tcode{T}.
 For every iterator type