diff --git a/aspeed-layer/recipes-bsp/u-boot/u-boot-aspeed-sdk_%.bbappend b/aspeed-layer/recipes-bsp/u-boot/u-boot-aspeed-sdk_%.bbappend
new file mode 100644
index 0000000..0e18a7c
--- /dev/null
+++ b/aspeed-layer/recipes-bsp/u-boot/u-boot-aspeed-sdk_%.bbappend
@@ -0,0 +1,2 @@
+FLASH_SIZE ?= "32768"
+ASPEED_IMAGE_SIZE_KB = "${FLASH_SIZE}"