diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
index 7300020ef1..d61be8e4bc 100644
--- a/documentation/ref-manual/classes.rst
+++ b/documentation/ref-manual/classes.rst
@@ -1705,6 +1705,14 @@ The :ref:`ref-classes-kernel-grub` class updates the boot area and the boot menu
 the kernel as the priority boot mechanism while installing a RPM to
 update the kernel on a deployed target.
 
+.. _ref-classes-kernel-module-dirs:
+
+``kernel-module-dirs``
+=======================
+
+The :ref:`ref-classes-kernel-module-dirs` class provides path variables related
+to kernel modules.
+
 .. _ref-classes-kernel-module-split:
 
 ``kernel-module-split``