diff --git a/static/build.html b/static/build.html
index 337a43c9..d54678d4 100644
--- a/static/build.html
+++ b/static/build.html
@@ -417,7 +417,7 @@ cd ../..</pre>
 
             <pre>cd kernel/google/crosshatch
 git submodule sync
-git submodule update --init
+git submodule update --init --recursive
 ./build.sh blueline</pre>
 
             <h3 id="setting-up-the-os-build-environment">