diff --git a/docs/user-guide.rst b/docs/user-guide.rst
index 68a74ed..087305d 100644
--- a/docs/user-guide.rst
+++ b/docs/user-guide.rst
@@ -52,7 +52,7 @@
 
 ::
 
-    sudo apt-get install build-essential gcc make git libssl-dev
+    sudo apt-get install device-tree-compiler build-essential gcc make git libssl-dev
 
 TF-A has been tested with `Linaro Release 17.10`_.