diff --git a/modules/jenkins/files/slave_scripts/gerrit-git-prep.sh b/modules/jenkins/files/slave_scripts/gerrit-git-prep.sh
index 6e0109dc2d..094566bef4 100755
--- a/modules/jenkins/files/slave_scripts/gerrit-git-prep.sh
+++ b/modules/jenkins/files/slave_scripts/gerrit-git-prep.sh
@@ -79,3 +79,10 @@ else
         git clean -x -f -d -q
     fi
 fi
+
+if [ -f .gitmodules ]
+then
+    git submodule init
+    git submodule sync
+    git submodule update --init
+fi