diff --git a/src/southbridge/intel/bd82x6x/pch.h b/src/southbridge/intel/bd82x6x/pch.h
index da1f901..f8131da 100644
--- a/src/southbridge/intel/bd82x6x/pch.h
+++ b/src/southbridge/intel/bd82x6x/pch.h
@@ -144,6 +144,7 @@
 #define ETR3			0xac
 #define  ETR3_CWORWRE		(1 << 18)
 #define  ETR3_CF9GR		(1 << 20)
+#define  ETR3_CF9LOCK		(1 << 31)
 
 /* GEN_PMCON_3 bits */
 #define RTC_BATTERY_DEAD	(1 << 2)