diff --git a/configs/at91sam9n12ek_mmc_defconfig b/configs/at91sam9n12ek_mmc_defconfig
index e7e8a01..d13eed0 100644
--- a/configs/at91sam9n12ek_mmc_defconfig
+++ b/configs/at91sam9n12ek_mmc_defconfig
@@ -48,3 +48,4 @@
 CONFIG_DM_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_LCD=y
+CONFIG_FAT_WRITE=y