diff --git a/lib/quantum_plugins/ryu b/lib/quantum_plugins/ryu
index 86105bc..f44f4ae 100644
--- a/lib/quantum_plugins/ryu
+++ b/lib/quantum_plugins/ryu
@@ -2,7 +2,7 @@
 # ------------------
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+MY_XTRACE=$(set +o | grep xtrace)
 set +o xtrace
 
 source $TOP_DIR/lib/quantum_plugins/ovs_base
@@ -60,4 +60,4 @@
 }
 
 # Restore xtrace
-$XTRACE
+$MY_XTRACE