diff --git a/fluid/neural_machine_translation/transformer/_ce.py b/fluid/neural_machine_translation/transformer/_ce.py
index 49e67a63c8377d01ff196ccb49a2e3f93814bcc0..88886a4bc1068bcfc7197a247f26c7a092aee7c2 100644
--- a/fluid/neural_machine_translation/transformer/_ce.py
+++ b/fluid/neural_machine_translation/transformer/_ce.py
@@ -2,7 +2,7 @@
 
 import os
 import sys
-sys.path.append(os.environ['ceroot'])
+sys.path.insert(0, os.environ['ceroot'])
 from kpi import CostKpi, DurationKpi, AccKpi
 
 #### NOTE kpi.py should shared in models in some way!!!!