diff --git a/doc/src/sgml/mvcc.sgml b/doc/src/sgml/mvcc.sgml
index 12b7814..84501e0 100644
--- a/doc/src/sgml/mvcc.sgml
+++ b/doc/src/sgml/mvcc.sgml
@@ -1140,6 +1140,9 @@ ERROR:  could not serialize access due to read/write dependencies among transact
      will result in disk writes.
     </para>
 
+   <sect2 id="locking-pages">
+    <title>Page-level Locks</title>
+  
     <para>
      In addition to table and row locks, page-level share/exclusive locks are
      used to control read/write access to table pages in the shared buffer