diff --git a/lib/neutron_plugins/ovs_base b/lib/neutron_plugins/ovs_base
index f0ef194569..07aa7cca9b 100644
--- a/lib/neutron_plugins/ovs_base
+++ b/lib/neutron_plugins/ovs_base
@@ -60,7 +60,11 @@ function _neutron_ovs_base_install_agent_packages {
 }
 
 function _neutron_ovs_base_configure_debug_command {
-    iniset $NEUTRON_TEST_CONFIG_FILE DEFAULT external_network_bridge $PUBLIC_BRIDGE
+    if [ "$Q_USE_PROVIDERNET_FOR_PUBLIC" = "True" ]; then
+        iniset $NEUTRON_TEST_CONFIG_FILE DEFAULT external_network_bridge ""
+    else
+        iniset $NEUTRON_TEST_CONFIG_FILE DEFAULT external_network_bridge $PUBLIC_BRIDGE
+    fi
 }
 
 function _neutron_ovs_base_configure_firewall_driver {