diff --git a/commands/ubiformat.c b/commands/ubiformat.c
index e63f16e..f9d952c 100644
--- a/commands/ubiformat.c
+++ b/commands/ubiformat.c
@@ -779,6 +779,7 @@
 BAREBOX_CMD_HELP_OPT("-e VALUE", "use VALUE as erase counter value for all eraseblocks")
 BAREBOX_CMD_HELP_OPT("-x NUM\t", "UBI version number to put to EC headers (default 1)")
 BAREBOX_CMD_HELP_OPT("-Q NUM\t", "32-bit UBI image sequence number to use")
+BAREBOX_CMD_HELP_OPT("-y\t", "Assume yes for all questions")
 BAREBOX_CMD_HELP_OPT("-q\t", "suppress progress percentage information")
 BAREBOX_CMD_HELP_OPT("-v\t", "be verbose")
 BAREBOX_CMD_HELP_TEXT("")