diff --git a/src/mainboard/google/zork/chromeos.fmd b/src/mainboard/google/zork/chromeos.fmd
index 7c2b95b6ec..be43e8a02d 100644
--- a/src/mainboard/google/zork/chromeos.fmd
+++ b/src/mainboard/google/zork/chromeos.fmd
@@ -1,6 +1,6 @@
 FLASH@0xFF000000 16M {
 	SI_BIOS {
-		RW_MRC_CACHE 64K
+		RW_MRC_CACHE(PRESERVE) 64K
 		RW_SECTION_A 3M {
 			VBLOCK_A 8K
 			FW_MAIN_A(CBFS)