diff --git a/arch/arm/src/calypso/calypso_power.c b/arch/arm/src/calypso/calypso_power.c
index cb97d6cfff..6f9cfc8ebf 100644
--- a/arch/arm/src/calypso/calypso_power.c
+++ b/arch/arm/src/calypso/calypso_power.c
@@ -29,7 +29,7 @@
  ****************************************************************************/
 
 #ifdef CONFIG_BOARDCTL_POWEROFF
-void board_power_off(int status)
+int board_power_off(int status)
 {
   uint16_t tx;
   struct spi_dev_s *spi = up_spiinitialize(0);