diff --git a/scripts/mkimage b/scripts/mkimage
index 04b0e2cd1c..40051a0ec4 100755
--- a/scripts/mkimage
+++ b/scripts/mkimage
@@ -216,8 +216,8 @@ elif [ "${BOOTLOADER}" = "u-boot" -a -n "${UBOOT_SYSTEM}" ]; then
   # create bootloader configuration
   echo "image: creating bootloader configuration..."
 
-  if [ "${UBOOT_SYSTEM}" != "box" ]; then
-    DTB="$(${SCRIPTS}/uboot_helper ${PROJECT} ${DEVICE} ${UBOOT_SYSTEM} dtb)"
+  DTB="$(${SCRIPTS}/uboot_helper ${PROJECT} ${DEVICE} ${UBOOT_SYSTEM} dtb)"
+  if [ -n "${DTB}" ]; then
 
     if [ -f "${RELEASE_DIR}/3rdparty/bootloader/${DTB}" ]; then
       mcopy "${RELEASE_DIR}/3rdparty/bootloader/${DTB}" ::