diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 3ff680b..16e6a8b 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -41,6 +41,7 @@
 	int (*set_mode) (struct thermal_zone_device *, const char *);
 	int (*get_trip_type) (struct thermal_zone_device *, int, char *);
 	int (*get_trip_temp) (struct thermal_zone_device *, int, char *);
+	int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
 };
 
 struct thermal_cooling_device_ops {