diff --git a/src/include/elog.h b/src/include/elog.h
index 5a84c75..488549e 100644
--- a/src/include/elog.h
+++ b/src/include/elog.h
@@ -104,6 +104,7 @@
 /* Chrome OS related events */
 #define ELOG_TYPE_CROS_DEVELOPER_MODE     0xa0
 #define ELOG_TYPE_CROS_RECOVERY_MODE      0xa1
+#define  ELOG_CROS_RECOVERY_MODE_BUTTON    0x02
 
 /* Management Engine Events */
 #define ELOG_TYPE_MANAGEMENT_ENGINE       0xa2