diff --git a/controllers/drupalsite_controller.go b/controllers/drupalsite_controller.go
index 715687b9468c9495f8c6d8efd78a667207bb46a0..d6e047782109220f382dec869c4b3f1296a0501e 100644
--- a/controllers/drupalsite_controller.go
+++ b/controllers/drupalsite_controller.go
@@ -51,6 +51,7 @@ const (
 	oidcSecretName       = "oidc-client-secret"
 
 	ssoProxyLabel = "drupal.okd.cern.ch/full-sso"
+	sitePrimaryLabel = "drupal.webservices.cern.ch/isPrimary"
 )
 
 var (