diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index f0c8e4f848..32c9e7407d 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -3971,6 +3971,7 @@ system and gives an overview of their function and contents.
       - wic.bz2
       - wic.gz
       - wic.lzma
+      - wic.zst
 
       For more information about these types of images, see
       ``meta/classes-recipe/image_types*.bbclass`` in the :term:`Source Directory`.