diff --git a/kernel/reboot.c b/kernel/reboot.c
index bd30a97..a6903bf 100644
--- a/kernel/reboot.c
+++ b/kernel/reboot.c
@@ -49,6 +49,7 @@
*/
void (*pm_power_off_prepare)(void);
+EXPORT_SYMBOL(pm_power_off_prepare);
/**
* emergency_restart - reboot the system
