fix bug
diff --git a/plstackapi/planetstack/api/roles.py b/plstackapi/planetstack/api/roles.py
index 34415d8..063f512 100644
--- a/plstackapi/planetstack/api/roles.py
+++ b/plstackapi/planetstack/api/roles.py
@@ -11,9 +11,9 @@
     role.save()
     return role
 
-def delete_role(auth, name):
+def delete_role(auth, role_id):
     driver = OpenStackDriver(client = auth_check(auth))   
-    role = Role.objects.filter(role_type=name)
+    role = Role.objects.filter(role__id=role_id)
     driver.delete_role(name) 
     role.delete()
     return 1