diff --git a/kolla/common/config.py b/kolla/common/config.py
index 4f93e79448..bde3b755e6 100755
--- a/kolla/common/config.py
+++ b/kolla/common/config.py
@@ -218,7 +218,7 @@ _CLI_OPTS = [
                      ' push properly')),
     cfg.IntOpt('retries', short='r', default=3, min=0,
                help='The number of times to retry while building'),
-    cfg.MultiOpt('regex', types.String(), positional=True,
+    cfg.MultiOpt('regex', types.String(), positional=True, required=False,
                  help=('Build only images matching regex and its'
                        ' dependencies')),
     cfg.StrOpt('registry',