Fix "since" version for PROJECT-DOMAIN-XXX props
diff --git a/guides/openstack.md b/guides/openstack.md
index 480196e..8946167 100644
--- a/guides/openstack.md
+++ b/guides/openstack.md
@@ -230,7 +230,7 @@
 final Properties overrides = new Properties();
 overrides.put(KeystoneProperties.KEYSTONE_VERSION, "3");
 overrides.put(KeystoneProperties.SCOPE, "project:myTenant");
-overrides.put(KeystoneProperties.PROJECT_DOMAIN_NAME, "default"); // Since jclouds v2.2.0 (see PROJECT_DOMAIN_ID as complement)
+overrides.put(KeystoneProperties.PROJECT_DOMAIN_NAME, "default"); // Since jclouds > v2.1.0 (see PROJECT_DOMAIN_ID as complement)
 
 ContextBuilder.newBuilder("openstack-nova")
    .endpoint("https://host:5000/v3")