diff --git a/src/config.yaml b/src/config.yaml
index ef9acb6..8c7c6b1 100644
--- a/src/config.yaml
+++ b/src/config.yaml
@@ -21,7 +21,7 @@ options:
     description: |
       Space delimited list of nameservers. These are the nameservers that have
       been provided to the domain registrar in order to delegate the domain to
-      Designate. e.g. "ns1.example.com ns2.example.com"
+      Designate. e.g. "ns1.example.com. ns2.example.com."
   neutron-domain:
     default:
     type: string