diff --git a/meta/conf/documentation.conf b/meta/conf/documentation.conf
index 075ab6a..845559a 100644
--- a/meta/conf/documentation.conf
+++ b/meta/conf/documentation.conf
@@ -212,6 +212,8 @@
 IMAGE_CLASSES[doc] = "A list of classes that all images should inherit."
 IMAGE_FEATURES[doc] = "The primary list of features to include in an image. Configure this variable in an image recipe."
 IMAGE_FSTYPES[doc] = "Formats of root filesystem images that you want to have created."
+IMAGE_FSTYPES_DEBUGFS[doc] = "Formats of the debug root filesystem images that you want to have created."
+IMAGE_GEN_DEBUGFS[doc] = "When set to '1', generate a companion debug object/source filesystem image."
 IMAGE_INSTALL[doc] = "Specifies the packages to install into an image. Image recipes set IMAGE_INSTALL to specify the packages to install into an image through image.bbclass."
 IMAGE_LINGUAS[doc] = "Specifies the list of locales to install into the image during the root filesystem construction process."
 IMAGE_NAME[doc] = "The name of the output image files minus the extension."