diff --git a/src/mainboard/google/cyan/devicetree.cb b/src/mainboard/google/cyan/devicetree.cb
index 2f2b2df7de..0454650c68 100644
--- a/src/mainboard/google/cyan/devicetree.cb
+++ b/src/mainboard/google/cyan/devicetree.cb
@@ -13,6 +13,7 @@ chip soc/intel/braswell
 	register "PcdApertureSize" = "2"
 	register "PcdGttSize" = "1"
 	register "PcdDvfsEnable" = "1"
+	register "PcdCaMirrorEn" = "0"
 
 	############################################################
 	# Set the parameters for SiliconInit