diff --git a/scripts/lib/wic/help.py b/scripts/lib/wic/help.py
index 148da89e0a..aee2451a72 100644
--- a/scripts/lib/wic/help.py
+++ b/scripts/lib/wic/help.py
@@ -687,6 +687,8 @@ DESCRIPTION
            apply to partitions created using '--source rootfs' (see
            --source above).  Valid values are:
 
+             vfat
+             msdos
              ext2
              ext3
              ext4