diff --git a/configs/at91sam9g20dfc_defconfig b/configs/at91sam9g20dfc_defconfig
index 0824868f1c..7511c96fe9 100644
--- a/configs/at91sam9g20dfc_defconfig
+++ b/configs/at91sam9g20dfc_defconfig
@@ -15,6 +15,13 @@ BR2_LINUX_KERNEL_INTREE_DTS_NAME="at91sam9g20ek"
 
 # Filesystem
 BR2_TARGET_ROOTFS_TAR=y
+BR2_TARGET_ROOTFS_UBI=y
+BR2_TARGET_ROOTFS_UBI_PEBSIZE=0x20000
+BR2_TARGET_ROOTFS_UBI_SUBSIZE=512
+BR2_TARGET_ROOTFS_UBIFS=y
+BR2_TARGET_ROOTFS_UBIFS_LEBSIZE=0x1f800
+BR2_TARGET_ROOTFS_UBIFS_MINIOSIZE=0x800
+BR2_TARGET_ROOTFS_UBIFS_MAXLEBCNT=2047
 
 # Bootloaders
 BR2_TARGET_AT91BOOTSTRAP3=y