diff --git a/kolla/common/config.py b/kolla/common/config.py
index aa910be6af6d90720961671fa60f18efcf0ebe21..39bc574552820fde379a6b4640d916efc41b92b3 100755
--- a/kolla/common/config.py
+++ b/kolla/common/config.py
@@ -224,7 +224,7 @@ _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',