diff --git a/doc/00_optional.qbk b/doc/00_optional.qbk
index f03e0ef..b99f8dc 100644
--- a/doc/00_optional.qbk
+++ b/doc/00_optional.qbk
@@ -80,13 +80,14 @@ This is how you solve it with `boost::optional`:
 [include 11_development.qbk]
 [include 12_when_to_use.qbk]
 [include 13_relational_operators.qbk]
-[include 14_io.qbk]
-[include 15_optional_references.qbk]
-[include 16_in_place_factories.qbk]
-[include 17_gotchas.qbk]
-[include 18_exception_safety.qbk]
-[include 19_type_requirements.qbk]
-[include 1A_on_performance.qbk]
+[include 14_monadic_interface.qbk]
+[include 15_io.qbk]
+[include 16_optional_references.qbk]
+[include 17_in_place_factories.qbk]
+[include 18_gotchas.qbk]
+[include 19_exception_safety.qbk]
+[include 1A_type_requirements.qbk]
+[include 1B_on_performance.qbk]
 [endsect]
 [section:reference Reference]
 [include 21_ref_none.qbk]