diff --git a/util/cbfstool/cbfs.h b/util/cbfstool/cbfs.h
index 0d33710..6fb9edd 100644
--- a/util/cbfstool/cbfs.h
+++ b/util/cbfstool/cbfs.h
@@ -76,6 +76,7 @@
 #define CBFS_COMPONENT_VSA        0x51
 #define CBFS_COMPONENT_MBI        0x52
 #define CBFS_COMPONENT_MICROCODE  0x53
+#define CBFS_COMPONENT_CMOS_DEFAULT 0xaa
 
 /* The deleted type is chosen to be a value
  * that can be written in a FLASH from all other