diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index c40fb2e..2281ca3 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -89,6 +89,7 @@
 {
 	return acpi_target_sleep_state;
 }
+EXPORT_SYMBOL_GPL(acpi_target_system_state);
 
 static bool pwr_btn_event_pending;