diff --git a/configs/microchip_sam9x60ek_mmc_dev_defconfig b/configs/microchip_sam9x60ek_mmc_dev_defconfig
index 00ccd784b5..06e03967c4 100644
--- a/configs/microchip_sam9x60ek_mmc_dev_defconfig
+++ b/configs/microchip_sam9x60ek_mmc_dev_defconfig
@@ -7,7 +7,6 @@ BR2_TARGET_GENERIC_HOSTNAME="sam9x60ek"
 BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV=y
 BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/microchip/sam9x60ek_mmc/genimage.cfg"
-BR2_TARGET_ROOTFS_EXT2_SIZE=120M
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
 BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,linux4microchip,linux,linux4microchip-2021.10)/linux-linux4microchip-2021.10.tar.gz"
@@ -67,6 +66,7 @@ BR2_PACKAGE_HTOP=y
 BR2_PACKAGE_VIM=y
 BR2_TARGET_ROOTFS_EXT2=y
 BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="120M"
 BR2_TARGET_AT91BOOTSTRAP3=y
 BR2_TARGET_AT91BOOTSTRAP3_CUSTOM_TARBALL=y
 BR2_TARGET_AT91BOOTSTRAP3_CUSTOM_TARBALL_LOCATION="$(call github,linux4sam,at91bootstrap,v4.0.1)/at91bootstrap-v4.0.1.tar.gz"