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diff --git a/extern/draco/draco/src/draco/mesh/mesh.cc b/extern/draco/draco/src/draco/mesh/mesh.cc
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+++ b/extern/draco/draco/src/draco/mesh/mesh.cc
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+// Copyright 2016 The Draco Authors.
+//
+// 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.
+//
+#include "draco/mesh/mesh.h"
+
+#include <array>
+
+namespace draco {
+
+// Shortcut for typed conditionals.
+template <bool B, class T, class F>
+using conditional_t = typename std::conditional<B, T, F>::type;
+
+Mesh::Mesh() {}
+
+#ifdef DRACO_ATTRIBUTE_INDICES_DEDUPLICATION_SUPPORTED
+void Mesh::ApplyPointIdDeduplication(
+    const IndexTypeVector<PointIndex, PointIndex> &id_map,
+    const std::vector<PointIndex> &unique_point_ids) {
+  PointCloud::ApplyPointIdDeduplication(id_map, unique_point_ids);
+  for (FaceIndex f(0); f < num_faces(); ++f) {
+    for (int32_t c = 0; c < 3; ++c) {
+      faces_[f][c] = id_map[faces_[f][c]];
+    }
+  }
+}
+#endif
+
+}  // namespace draco