diff --git a/awx/main/models/rbac.py b/awx/main/models/rbac.py
index d2869fca38..3dd88d5227 100644
--- a/awx/main/models/rbac.py
+++ b/awx/main/models/rbac.py
@@ -437,5 +437,5 @@ def get_roles_on_resource(resource, accessor):
             ancestor__in=roles,
             content_type_id=ContentType.objects.get_for_model(resource).id,
             object_id=resource.id
-        ).values_list('role_field', flat=True)
+        ).values_list('role_field', flat=True).distinct()
     ]