diff --git a/Documentation/DocBook/kernel-locking.tmpl b/Documentation/DocBook/kernel-locking.tmpl
index 67e7ab41c0a6592a747bd414e3bf5923f111ca6a..09e884e5b9f53d1ff32bbc785c61dcb6ec5e56e4 100644
--- a/Documentation/DocBook/kernel-locking.tmpl
+++ b/Documentation/DocBook/kernel-locking.tmpl
@@ -1955,12 +1955,17 @@ machines due to caching.
    </sect1>
   </chapter>
 
-  <chapter id="apiref">
+  <chapter id="apiref-mutex">
    <title>Mutex API reference</title>
 !Iinclude/linux/mutex.h
 !Ekernel/mutex.c
   </chapter>
 
+  <chapter id="apiref-futex">
+   <title>Futex API reference</title>
+!Ikernel/futex.c
+  </chapter>
+
   <chapter id="references">
    <title>Further reading</title>