diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index 1425358a36..43e38b217b 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -4601,6 +4601,25 @@ system and gives an overview of their function and contents.
          even if the toolchain's binaries are strippable, there are other files
          needed for the build that are not strippable.
 
+   :term:`INHIBIT_UPDATERCD_BBCLASS`
+      Prevents the :ref:`ref-classes-update-rc.d` class from automatically
+      installing and registering SysV init scripts for packages.
+
+      When a recipe inherits the :ref:`ref-classes-update-rc.d` class, init
+      scripts are typically installed and registered for the packages listed in
+      :term:`INITSCRIPT_PACKAGES`. This ensures that the relevant
+      services are started and stopped at the appropriate runlevels using the
+      traditional SysV init system.
+
+      To prevent the build system from adding these scripts and configurations
+      automatically, set the :term:`INHIBIT_UPDATERCD_BBCLASS` variable as follows::
+
+         INHIBIT_UPDATERCD_BBCLASS = "1"
+
+      By default, the value of :term:`INHIBIT_UPDATERCD_BBCLASS` is empty. Setting
+      it to "0" does not disable inhibition. Only the empty string will disable
+      inhibition.
+
    :term:`INIT_MANAGER`
       Specifies the system init manager to use. Available options are: