diff --git a/doc/uImage.FIT/update3.its b/doc/uImage.FIT/update3.its
index 285cf73..a6eaef6 100644
--- a/doc/uImage.FIT/update3.its
+++ b/doc/uImage.FIT/update3.its
@@ -1,6 +1,9 @@
 /*
  * Example Automatic software update file.
  */
+
+/dts-v1/;
+
 / {
 	description = "Automatic software updates: kernel, ramdisk, FDT";
 	#address-cells = <1>;