diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index 85633c5..b9c6fcb 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -59,6 +59,7 @@ static int acpi_pm_set_target(suspend_state_t pm_state)
 	}
 	return error;
 }
+#endif /* CONFIG_SUSPEND */
 
 int acpi_sleep_prepare(u32 acpi_state)
 {
@@ -81,6 +82,7 @@ int acpi_sleep_prepare(u32 acpi_state)
 	return 0;
 }
 
+#ifdef CONFIG_SUSPEND
 /**
  *	acpi_pm_prepare - Do preliminary suspend work.
  *	@pm_state: ignored