diff --git a/meta/conf/documentation.conf b/meta/conf/documentation.conf
index 295fefb80e..2dcf85f767 100644
--- a/meta/conf/documentation.conf
+++ b/meta/conf/documentation.conf
@@ -222,6 +222,7 @@ IMAGE_PKGTYPE[doc] = "Defines the package type (DEB, RPM, IPK, or TAR) used by t
 IMAGE_POSTPROCESS_COMMAND[doc] = "Added by classes to run post processing commands once the OpenEmbedded build system has created the image."
 IMAGE_ROOTFS[doc] = "The location of the root filesystem while it is under construction (i.e. during do_rootfs)."
 IMAGE_ROOTFS_EXTRA_SPACE[doc] = "Defines additional free disk space created in the image in Kbytes. By default, this variable is set to '0'."
+IMAGE_ROOTFS_MAXSIZE[doc] = "Defines the maximum size in Kbytes for the generated image."
 IMAGE_ROOTFS_SIZE[doc] = "Defines the size in Kbytes for the generated image."
 IMAGE_TYPES[doc] = "Specifies the complete list of supported image types by default."
 INC_PR[doc] = "Helps define the recipe revision for recipes that share a common include file."