diff --git a/source/README.md b/source/README.md
index d62127c..b9c00e1 100644
--- a/source/README.md
+++ b/source/README.md
@@ -1,2 +1,5 @@
 ## Download the Ubuntu sources here if you are building custom DTB's
-See [build-tree README](../build-tree/README.md).
+
+This is not necesscary when using the generic device tree, it is only needed for building custom device trees.
+
+See [build-tree README](../build-tree/README.md) for details.