diff --git a/Documentation/locking/locktypes.rst b/Documentation/locking/locktypes.rst
index 1b577a8bf9829518c3e8f68aa90c7156e47b0c71..4cefed8048ca42c473148c113529c11ffbb5d9ba 100644
--- a/Documentation/locking/locktypes.rst
+++ b/Documentation/locking/locktypes.rst
@@ -10,7 +10,7 @@ Introduction
 ============
 
 The kernel provides a variety of locking primitives which can be divided
-into two categories:
+into three categories:
 
  - Sleeping locks
  - CPU local locks