diff --git a/src/flash/nor/at91samd.c b/src/flash/nor/at91samd.c
index ad0da5d7e..a0d603a2c 100644
--- a/src/flash/nor/at91samd.c
+++ b/src/flash/nor/at91samd.c
@@ -1241,6 +1241,7 @@ static const struct command_registration at91samd_exec_command_handlers[] = {
 			"This makes it impossible to read the Flash contents. "
 			"The only way to undo this is to issue the chip-erase "
 			"command.",
+		.usage = "'enable'",
 	},
 	{
 		.name = "eeprom",