diff --git a/lib/quantum_plugins/openvswitch b/lib/quantum_plugins/openvswitch
index 726c6c3..8df1246 100644
--- a/lib/quantum_plugins/openvswitch
+++ b/lib/quantum_plugins/openvswitch
@@ -36,6 +36,7 @@
 
 function quantum_plugin_configure_l3_agent() {
     _quantum_ovs_base_configure_l3_agent
+    iniset $Q_L3_CONF_FILE DEFAULT l3_agent_manager quantum.agent.l3_agent.L3NATAgentWithStateReport
 }
 
 function quantum_plugin_configure_plugin_agent() {