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diff --git a/third_party/wasm2c/include/wabt/range.h b/third_party/wasm2c/include/wabt/range.h
new file mode 100644
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+++ b/third_party/wasm2c/include/wabt/range.h
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+/*
+ * Copyright 2017 WebAssembly Community Group participants
+ *
+ * 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 WABT_RANGE_H_
+#define WABT_RANGE_H_
+
+namespace wabt {
+
+template <typename T>
+struct Range {
+  Range() : start(0), end(0) {}
+  Range(T start, T end) : start(start), end(end) {}
+  T start;
+  T end;
+
+  T size() const { return end - start; }
+};
+
+using OffsetRange = Range<Offset>;
+using ColumnRange = Range<int>;
+
+}  // namespace wabt
+
+#endif  // WABT_RANGE_H_