diff --git a/TestON/tests/ProdFunc13/ProdFunc13.topo b/TestON/tests/ProdFunc13/ProdFunc13.topo
index 9cef3f7..2605b2e 100755
--- a/TestON/tests/ProdFunc13/ProdFunc13.topo
+++ b/TestON/tests/ProdFunc13/ProdFunc13.topo
@@ -49,6 +49,7 @@
                 <arg1> --custom ~/mininet/custom/topo-HA.py </arg1>
                 <arg2> --topo mytopo </arg2>
                 <arg3> --switch ovs,protocols=OpenFlow13 </arg3>
+                <arg4> --mac </arg4>
                 <controller> remote </controller>
             </COMPONENTS>
         </Mininet1>