diff --git a/contrail_provisioning/config/templates/contrail_api_conf.py b/contrail_provisioning/config/templates/contrail_api_conf.py
index 873eff2e..5dc3305f 100644
--- a/contrail_provisioning/config/templates/contrail_api_conf.py
+++ b/contrail_provisioning/config/templates/contrail_api_conf.py
@@ -19,6 +19,7 @@
 redis_server_ip=$__contrail_redis_ip__
 rabbit_server=$__rabbit_server_ip__
 rabbit_port=$__rabbit_server_port__
+list_optimization_enabled=True
 
 [SECURITY]
 use_certs=$__contrail_use_certs__