diff --git a/meta-facebook/meta-bletchley/recipes-kernel/linux/linux-aspeed/bletchley.cfg b/meta-facebook/meta-bletchley/recipes-kernel/linux/linux-aspeed/bletchley.cfg
index 49d7404..9b7609c 100644
--- a/meta-facebook/meta-bletchley/recipes-kernel/linux/linux-aspeed/bletchley.cfg
+++ b/meta-facebook/meta-bletchley/recipes-kernel/linux/linux-aspeed/bletchley.cfg
@@ -1,3 +1,5 @@
+# large memory support
+CONFIG_VMSPLIT_3G_OPT=y
 # aspeed-pwm driver
 CONFIG_HAVE_CLK=y
 CONFIG_PWM=y