diff --git a/Documentation/DocBook/kernel-locking.tmpl b/Documentation/DocBook/kernel-locking.tmpl
index 0a441f73261a32be74c01916a2171233251951d8..01825ee7db64031878c6c9e647cd698547c9d558 100644
--- a/Documentation/DocBook/kernel-locking.tmpl
+++ b/Documentation/DocBook/kernel-locking.tmpl
@@ -219,7 +219,7 @@
    </para>
 
    <sect1 id="lock-intro">
-   <title>Two Main Types of Kernel Locks: Spinlocks and Semaphores</title>
+   <title>Three Main Types of Kernel Locks: Spinlocks, Mutexes and Semaphores</title>
 
    <para>
      There are three main types of kernel locks.  The fundamental type