diff --git a/lib/neutron-legacy b/lib/neutron-legacy
index b381b642c6..446c7144f5 100644
--- a/lib/neutron-legacy
+++ b/lib/neutron-legacy
@@ -20,6 +20,7 @@
 # - init_neutron_third_party
 # - start_neutron_third_party
 # - create_nova_conf_neutron
+# - configure_neutron_after_post_config
 # - start_neutron_service_and_check
 # - check_neutron_third_party_integration
 # - start_neutron_agents
@@ -331,7 +332,6 @@ function configure_mutnauq {
     _configure_neutron_common
     iniset_rpc_backend neutron $NEUTRON_CONF
 
-    # goes before q-svc to init Q_SERVICE_PLUGIN_CLASSES
     if is_service_enabled q-metering; then
         _configure_neutron_metering
     fi
@@ -464,6 +464,13 @@ function install_neutron_agent_packages_mutnauq {
     fi
 }
 
+# Finish neutron configuration
+function configure_neutron_after_post_config {
+    if [[ $Q_SERVICE_PLUGIN_CLASSES != '' ]]; then
+        iniset $NEUTRON_CONF DEFAULT service_plugins $Q_SERVICE_PLUGIN_CLASSES
+    fi
+}
+
 # Start running processes, including screen
 function start_neutron_service_and_check {
     local service_port=$Q_PORT
@@ -836,10 +843,6 @@ function _configure_neutron_service {
     # Update either configuration file with plugin
     iniset $NEUTRON_CONF DEFAULT core_plugin $Q_PLUGIN_CLASS
 
-    if [[ $Q_SERVICE_PLUGIN_CLASSES != '' ]]; then
-        iniset $NEUTRON_CONF DEFAULT service_plugins $Q_SERVICE_PLUGIN_CLASSES
-    fi
-
     iniset $NEUTRON_CONF DEFAULT debug $ENABLE_DEBUG_LOG_LEVEL
     iniset $NEUTRON_CONF oslo_policy policy_file $Q_POLICY_FILE
     iniset $NEUTRON_CONF DEFAULT allow_overlapping_ips $Q_ALLOW_OVERLAPPING_IP
diff --git a/stack.sh b/stack.sh
index 7d440a7c20..19b07ab06b 100755
--- a/stack.sh
+++ b/stack.sh
@@ -1241,6 +1241,7 @@ if is_service_enabled neutron-api; then
     start_neutron_api
 elif is_service_enabled q-svc; then
     echo_summary "Starting Neutron"
+    configure_neutron_after_post_config
     start_neutron_service_and_check
 elif is_service_enabled $DATABASE_BACKENDS && is_service_enabled n-net; then
     NM_CONF=${NOVA_CONF}