diff --git a/package/boot/uboot-rockchip/Makefile b/package/boot/uboot-rockchip/Makefile
index 2ea144a5f1..7db6395370 100644
--- a/package/boot/uboot-rockchip/Makefile
+++ b/package/boot/uboot-rockchip/Makefile
@@ -194,7 +194,7 @@ UBOOT_CONFIGURE_VARS += USE_PRIVATE_LIBGCC=yes
 UBOOT_CUSTOMIZE_CONFIG := \
 	--disable SPL_FIT_SIGNATURE \
 	--disable TOOLS_MKEFICAPSULE \
-	--set-val MKIMAGE_DTC_PATH $(PKG_BUILD_DIR)/scripts/dtc/dtc
+	--set-str MKIMAGE_DTC_PATH $(PKG_BUILD_DIR)/scripts/dtc/dtc
 
 UBOOT_MAKE_FLAGS += \
   PATH=$(STAGING_DIR_HOST)/bin:$(PATH) \