diff --git a/buildbot/buildbot_steps.sh b/buildbot/buildbot_steps.sh
index 219c079..a9deaed 100755
--- a/buildbot/buildbot_steps.sh
+++ b/buildbot/buildbot_steps.sh
@@ -10,6 +10,7 @@ function clone_ipxe_upstream() {
     #fi
 
     #git clone git://git.ipxe.org/ipxe.git "$ipxe_src_dir" || return 1
+    git submodule update --init --recursive
     cd "$ipxe_src_dir"
 
     # Known good commit