diff --git a/conf/machine/include/rk3288.inc b/conf/machine/include/rk3288.inc
index a648b44..70d554f 100644
--- a/conf/machine/include/rk3288.inc
+++ b/conf/machine/include/rk3288.inc
@@ -13,6 +13,6 @@ SERIAL_CONSOLES = "115200;ttyS2"
 KBUILD_DEFCONFIG ?= "multi_v7_defconfig"
 KERNEL_FEATURES:append:rk3288 = " bsp/rockchip/remove-non-rockchip-arch-arm.scc"
 
-UBOOT_SUFFIX ?= "bin"
+UBOOT_SUFFIX ?= "img"
 
 ENABLE_STATELESS_VPU_GST ?= "1"