diff --git a/doc/details.qbk b/doc/details.qbk
index 0e3ece2..cad8070 100644
--- a/doc/details.qbk
+++ b/doc/details.qbk
@@ -21,9 +21,11 @@ later
 
 [endsect]
 
+[/
 [section Transformations and simplification of trees]
 
 [endsect]
+]
 
 
 [endsect]