ports are a list in a group
diff --git a/olt.py b/olt.py
index 3cbc96a..6f4f15c 100644
--- a/olt.py
+++ b/olt.py
@@ -676,7 +676,7 @@
 
         vlan_id = 201
 
-        group = createAllGroupAdd(1, onu_port)
+        group = createAllGroupAdd(1, [onu_port])
 
         self.controller.message_send(group_add)
         do_barrier(self.controller)