diff --git a/build_files/buildbot/master.cfg b/build_files/buildbot/master.cfg
index 8db3e1be97c..ff0c105d68e 100644
--- a/build_files/buildbot/master.cfg
+++ b/build_files/buildbot/master.cfg
@@ -154,6 +154,7 @@ def git_submodule_step(submodule):
     return Git(name=submodule + '.git',
                repourl='git://git.blender.org/' + submodule + '.git',
                mode='update',
+               branch='master',
                workdir=submodule + '.git')