diff --git a/doc/mpi.qbk b/doc/mpi.qbk
index f722933..63a3459 100644
--- a/doc/mpi.qbk
+++ b/doc/mpi.qbk
@@ -2167,3 +2167,4 @@ an MPI setting and the performance benefits of specialization in a C++
 abstraction layer for MPI. Jeremy Siek managed the formal review of Boost.MPI.
 
 [endsect]
+[endsect]