diff --git a/configs/at91sam9x5ek_mmc_dev_defconfig b/configs/at91sam9x5ek_mmc_dev_defconfig
index 103b457d93..09482d2295 100644
--- a/configs/at91sam9x5ek_mmc_dev_defconfig
+++ b/configs/at91sam9x5ek_mmc_dev_defconfig
@@ -81,6 +81,7 @@ BR2_PACKAGE_VIM=y
 # Filesystem
 BR2_TARGET_ROOTFS_EXT2=y
 BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_BLOCKS=120000
 
 # Bootloaders
 BR2_TARGET_AT91BOOTSTRAP3=y