diff --git a/devstack/plugin.sh b/devstack/plugin.sh
old mode 100644
new mode 100755
index e0760e563d..f94de90682
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -17,7 +17,7 @@
 
 # Save trace setting
 XTRACE=$(set +o | grep xtrace)
-set +o xtrace
+set -o xtrace
 
 
 # Functions