diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index ec40b3e6fc..3a08f78d30 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -6837,6 +6837,15 @@ system and gives an overview of their function and contents.
       the recipe will be skipped, and if the build system attempts to build
       the recipe then an error will be triggered.
 
+   :term:`REQUIRED_MACHINE_FEATURES`
+      When inheriting the :ref:`ref-classes-features_check` class, this variable
+      identifies :term:`MACHINE_FEATURES` that must exist in the current
+      configuration in order for the :term:`OpenEmbedded Build System` to build
+      the recipe. In other words, if the :term:`REQUIRED_MACHINE_FEATURES` variable
+      lists a feature that does not appear in :term:`MACHINE_FEATURES` within the
+      current configuration, then the recipe will be skipped, and if the build
+      system attempts to build the recipe then an error will be triggered.
+
    :term:`REQUIRED_VERSION`
       If there are multiple versions of a recipe available, this variable
       determines which version should be given preference.