diff --git a/lib/neutron_plugins/services/firewall b/lib/neutron_plugins/services/firewall
index 3496da8..1d81a21 100644
--- a/lib/neutron_plugins/services/firewall
+++ b/lib/neutron_plugins/services/firewall
@@ -4,7 +4,7 @@
 # ---------------------------
 
 # Save trace setting
-FW_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_FIREWALL=$(set +o | grep xtrace)
 set +o xtrace
 
 FWAAS_PLUGIN=neutron_fwaas.services.firewall.fwaas_plugin.FirewallPlugin
@@ -26,4 +26,4 @@
 }
 
 # Restore xtrace
-$FW_XTRACE
+$_XTRACE_NEUTRON_FIREWALL