diff --git a/src/mainboard/lippert/roadrunner2/Config b/src/mainboard/lippert/roadrunner2/Config
index f30a97fc44..a99df93780 100644
--- a/src/mainboard/lippert/roadrunner2/Config
+++ b/src/mainboard/lippert/roadrunner2/Config
@@ -55,6 +55,7 @@ option CS5530_PRIMARY_IDE=1
 option NO_KEYBOARD
 option FINAL_MAINBOARD_FIXUP=1
 object mainboard.o
+option ZMASK=0xfffc0000
 
 # Local variables:
 #   compile-command: "make -C /export/bios/voyager2"