diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 6b2097ef34..93b7588385 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -6606,6 +6606,7 @@
                     by default:
                     <literallayout class='monospaced'>
      btrfs
+     container
      cpio
      cpio.gz
      cpio.lz4
@@ -6621,13 +6622,14 @@
      ext3.gz
      ext4
      ext4.gz
-     hdddirect
+     f2fs
      hddimg
      iso
      jffs2
      jffs2.sum
      multiubi
      squashfs
+     squashfs-lz4
      squashfs-lzo
      squashfs-xz
      tar