diff --git a/multi_traffic/python_modules/multi_traffic.py b/multi_traffic/python_modules/multi_traffic.py
index 165feb6e..a0e4bb48 100755
--- a/multi_traffic/python_modules/multi_traffic.py
+++ b/multi_traffic/python_modules/multi_traffic.py
@@ -127,7 +127,7 @@ def metric_init(params):
     
     define_device = False
     for para in params.keys():
-         if para.startswith('target_device'): define_device = True
+        if para.startswith('target_device'): define_device = True
     if not define_device:
         params["target_device0"] = "lo"