diff --git a/arch/mips/configs/ci20_defconfig b/arch/mips/configs/ci20_defconfig
index f88b05fd3077bb38247169f25d9fea29f6e1fb3d..be23fd25eeaa5c89f0e22efc22ba85e22e3a93c4 100644
--- a/arch/mips/configs/ci20_defconfig
+++ b/arch/mips/configs/ci20_defconfig
@@ -111,6 +111,7 @@ CONFIG_DMADEVICES=y
 CONFIG_DMA_JZ4780=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_MEMORY=y
+CONFIG_EXT4_FS=y
 # CONFIG_DNOTIFY is not set
 CONFIG_PROC_KCORE=y
 # CONFIG_PROC_PAGE_MONITOR is not set