diff --git a/BoardConfig.mk b/BoardConfig.mk
index ac20b73..64a0e6c 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -128,6 +128,7 @@ TARGET_PROVIDES_KEYMASTER := true
 # Partitions
 BOARD_BOOTIMAGE_PARTITION_SIZE := 100663296
 BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
+BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
 BOARD_CACHEIMAGE_PARTITION_SIZE := 268435456
 BOARD_DTBOIMG_PARTITION_SIZE := 25165824
 BOARD_FLASH_BLOCK_SIZE := 262144 # (BOARD_KERNEL_PAGESIZE * 64)