diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index fa8243c5c062c31b74847a0eb7c87e1f2d30e240..dd5f21ca483e5e5b849133b91909449eb33ed435 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -870,7 +870,7 @@ static struct syscore_ops acpi_sleep_syscore_ops = {
 	.resume = acpi_restore_bm_rld,
 };
 
-void acpi_sleep_syscore_init(void)
+static void acpi_sleep_syscore_init(void)
 {
 	register_syscore_ops(&acpi_sleep_syscore_ops);
 }