diff --git a/doc/source/reference_manual/cstsmapmerge.rst b/doc/source/reference_manual/cstsmapmerge.rst
index 46be15d..1370f10 100644
--- a/doc/source/reference_manual/cstsmapmerge.rst
+++ b/doc/source/reference_manual/cstsmapmerge.rst
@@ -69,3 +69,4 @@ Standard parameters
 Related tools or scripts
 ------------------------
 
+:ref:`cstsmap`