diff --git a/python/paddle/fluid/contrib/layers/metric_op.py b/python/paddle/fluid/contrib/layers/metric_op.py
index 07d6b464ddb114e15773943eab0610a5101fb025..d913df7d69a6c4256a9030d4cc79b9cc1a6732d6 100755
--- a/python/paddle/fluid/contrib/layers/metric_op.py
+++ b/python/paddle/fluid/contrib/layers/metric_op.py
@@ -20,6 +20,7 @@ from paddle.fluid.layer_helper import LayerHelper
 from paddle.fluid.framework import Variable
 from paddle.fluid.param_attr import ParamAttr
 from paddle.fluid.layers import tensor
+import paddle
 
 __all__ = ['ctr_metric_bundle']