diff --git a/Documentation/vm/hmm.rst b/Documentation/vm/hmm.rst
index 6f9e000..7453acc 100644
--- a/Documentation/vm/hmm.rst
+++ b/Documentation/vm/hmm.rst
@@ -1,4 +1,4 @@
-.. hmm:
+.. _hmm:
 
 =====================================
 Heterogeneous Memory Management (HMM)