diff --git a/doc/type_traits.qbk b/doc/type_traits.qbk
index 08c7a87..00ddce2 100644
--- a/doc/type_traits.qbk
+++ b/doc/type_traits.qbk
@@ -1251,7 +1251,7 @@ __header ` #include <boost/type_traits/extent.hpp>` or ` #include <boost/type_tr
 
 __examples
 
-[:`extent<int[1]>` inherits from `__integral_constant<std::size_t, 0>`.]
+[:`extent<int[1]>` inherits from `__integral_constant<std::size_t, 1>`.]
 
 [:`extent<double[2][3][4], 1>::type` is the type `__integral_constant<std::size_t, 3>`.]
 
@@ -2853,3 +2853,4 @@ www.boost.org/more/mailing_lists.htm#main] for subscription details).
 
 [endsect]
 
+