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diff --git a/tensorflow/contrib/tensorrt/segment/segment.h b/tensorflow/contrib/tensorrt/segment/segment.h
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+/* Copyright 2018 The TensorFlow Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+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.
+==============================================================================*/
+
+#ifndef TENSORFLOW_CONTRIB_TENSORRT_SEGMENT_SEGMENT_H_
+#define TENSORFLOW_CONTRIB_TENSORRT_SEGMENT_SEGMENT_H_
+
+#include <set>
+#include <vector>
+
+#include "tensorflow/core/framework/graph.pb.h"
+#include "tensorflow/core/lib/core/status.h"
+#include "tensorflow/core/platform/types.h"
+
+namespace tensorflow {
+namespace tensorrt {
+namespace segment {
+
+using SegmentNodesVector = std::vector<std::set<string>>;
+
+struct SegmentOptions {
+  // Segment must contain at least this many nodes.
+  int minimum_segment_size = 2;
+  std::set<string> exclude_node_list;
+};
+
+// Get the subgraphs of a graph that can be handled by TensorRT.
+//
+// @param gdef The GraphDef describing the network
+// @param candidate_fn A function that returns true for a NodeDef if
+// that node can be handled by TensorRT.
+// @param segments Returns the TensorRT segments/subgraphs. Each entry
+// in the vector describes a subgraph by giving a set of the names of
+// all the NodeDefs in that subgraph.
+// @return the status.
+tensorflow::Status SegmentGraph(
+    const tensorflow::GraphDef& gdef,
+    const std::function<bool(const tensorflow::NodeDef&)>& candidate_fn,
+    const SegmentOptions& options, SegmentNodesVector* segments);
+
+}  // namespace segment
+}  // namespace tensorrt
+}  // namespace tensorflow
+
+#endif  // TENSORFLOW_CONTRIB_TENSORRT_SEGMENT_SEGMENT_H_