diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h
index 7aae2c2..fa98656 100644
--- a/include/dm/ofnode.h
+++ b/include/dm/ofnode.h
@@ -59,6 +59,9 @@
 /**
  * oftree_from_fdt() - Returns an oftree from a flat device tree pointer
  *
+ * If @fdt is not already registered in the list of current device trees, it is
+ * added to the list.
+ *
  * @fdt: Device tree to use
  *
  * Returns: reference to the given node