diff --git a/paddle/fluid/operators/deformable_psroi_pooling_op.cu b/paddle/fluid/operators/deformable_psroi_pooling_op.cu
index 800ff5ef8500f46f3a97ede734c6b4310afa3ce3..c38e955385c79de82b28884bee81bfb57b993af6 100644
--- a/paddle/fluid/operators/deformable_psroi_pooling_op.cu
+++ b/paddle/fluid/operators/deformable_psroi_pooling_op.cu
@@ -11,6 +11,15 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
+//
+// Part of the following code in this file refs to
+// https://github.com/msracver/Deformable-ConvNets/blob/master/faster_rcnn/operator_cxx/deformable_psroi_pooling.cu
+//
+// Copyright (c) 2017 Microsoft
+// Licensed under The Apache-2.0 License [see LICENSE for details]
+// \file deformable_psroi_pooling.cu
+// \brief
+// \author Yi Li, Guodong Zhang, Jifeng Dai
 
 #pragma once
 #include <stdio.h>
diff --git a/paddle/fluid/operators/deformable_psroi_pooling_op.h b/paddle/fluid/operators/deformable_psroi_pooling_op.h
index a22ccbd3ffb5aa2dfe26e6dc41ebd1ab4a5fc1a3..22df51c6deabab7b121475a83d05d5720b566f0e 100644
--- a/paddle/fluid/operators/deformable_psroi_pooling_op.h
+++ b/paddle/fluid/operators/deformable_psroi_pooling_op.h
@@ -11,6 +11,15 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
+//
+// Part of the following code in this file refs to
+// https://github.com/msracver/Deformable-ConvNets/blob/master/faster_rcnn/operator_cxx/deformable_psroi_pooling.cu
+//
+// Copyright (c) 2017 Microsoft
+// Licensed under The Apache-2.0 License [see LICENSE for details]
+// \file deformable_psroi_pooling.cu
+// \brief
+// \author Yi Li, Guodong Zhang, Jifeng Dai
 
 #pragma once
 #include <algorithm>