diff --git a/arch/arm/mach-shmobile/board-g4evm.c b/arch/arm/mach-shmobile/board-g4evm.c
index e256b7cc4275..2c3ff6f7f34c 100644
--- a/arch/arm/mach-shmobile/board-g4evm.c
+++ b/arch/arm/mach-shmobile/board-g4evm.c
@@ -117,7 +117,7 @@ static struct platform_device nor_flash_device = {
 };
 
 /* USBHS */
-void usb_host_port_power(int port, int power)
+static void usb_host_port_power(int port, int power)
 {
 	if (!power) /* only power-on supported for now */
 		return;