diff --git a/lib/neutron-legacy b/lib/neutron-legacy
index 4069439183..64126094cb 100644
--- a/lib/neutron-legacy
+++ b/lib/neutron-legacy
@@ -979,7 +979,7 @@ function _configure_neutron_dhcp_agent {
     iniset $Q_DHCP_CONF_FILE DEFAULT use_namespaces $Q_USE_NAMESPACE
     iniset $Q_DHCP_CONF_FILE DEFAULT root_helper "$Q_RR_COMMAND"
     if [[ "$Q_USE_ROOTWRAP_DAEMON" == "True" ]]; then
-        iniset $NEUTRON_TEST_CONFIG_FILE agent root_helper_daemon "$Q_RR_DAEMON_COMMAND"
+        iniset $Q_DHCP_CONF_FILE agent root_helper_daemon "$Q_RR_DAEMON_COMMAND"
     fi
 
     if ! is_service_enabled q-l3; then