diff --git a/util/e6400-flash-unlock/e6400_flash_unlock.c b/util/e6400-flash-unlock/e6400_flash_unlock.c
index 0bffef6d205b5ae3ee99bbea7d1d1c95742b3860..9302d099ffb14328612c9e2a590177bb352daeb8 100644
--- a/util/e6400-flash-unlock/e6400_flash_unlock.c
+++ b/util/e6400-flash-unlock/e6400_flash_unlock.c
@@ -38,7 +38,7 @@ EC_FDO_CMD {
 };
 
 int get_fdo_status(void);
-uint8_t ec_fdo_command(enum EC_FDO_CMD arg);
+void ec_fdo_command(enum EC_FDO_CMD arg);
 void write_ec_reg(uint8_t index, uint8_t data);
 void send_ec_cmd(uint8_t cmd);
 void wait_ec(void);
@@ -106,12 +106,11 @@ get_fdo_status(void)
  * 2 = Enable FDO for next boot
  * 3 = Disable FDO for next boot - TODO
  */
-uint8_t
+void
 ec_fdo_command(enum EC_FDO_CMD arg)
 {
 	write_ec_reg(0x12, arg);
 	send_ec_cmd(0xb8);
-	return 1;
 }
 
 void