diff --git a/arch/arm/configs/vexpress_gem5_defconfig b/arch/arm/configs/vexpress_gem5_defconfig
index 554d332..48ef24a 100644
--- a/arch/arm/configs/vexpress_gem5_defconfig
+++ b/arch/arm/configs/vexpress_gem5_defconfig
@@ -22,7 +22,7 @@
 CONFIG_OPROFILE=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
-# CONFIG_LBDAF is not set
+CONFIG_LBDAF=y 
 # CONFIG_BLK_DEV_BSG is not set
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set