diff --git a/lib/neutron_plugins/linuxbridge_agent b/lib/neutron_plugins/linuxbridge_agent
index f28bcfe..096722b 100644
--- a/lib/neutron_plugins/linuxbridge_agent
+++ b/lib/neutron_plugins/linuxbridge_agent
@@ -4,7 +4,7 @@
 # -----------------------------
 
 # Save trace setting
-PLUGIN_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_LB=$(set +o | grep xtrace)
 set +o xtrace
 
 function neutron_lb_cleanup {
@@ -93,4 +93,4 @@
 }
 
 # Restore xtrace
-$PLUGIN_XTRACE
+$_XTRACE_NEUTRON_LB