diff --git a/docs/source/cpg.rst b/docs/source/cpg.rst
index 8603218..03cf2c3 100644
--- a/docs/source/cpg.rst
+++ b/docs/source/cpg.rst
@@ -1,3 +1,4 @@
+.. _cpg-module-documentation:
 CpG Module Documentation
 ==============================