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diff --git a/third_party/wasm2c/src/make-unique.h b/third_party/wasm2c/src/make-unique.h
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+++ b/third_party/wasm2c/src/make-unique.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_MAKE_UNIQUE_H_
+#define WABT_MAKE_UNIQUE_H_
+
+#include <memory>
+
+namespace wabt {
+
+// This is named MakeUnique instead of make_unique because make_unique has the
+// potential to conflict with std::make_unique if it is defined.
+//
+// On gcc/clang, we currently compile with c++11, which doesn't define
+// std::make_unique, but on MSVC the newest C++ version is always used, which
+// includes std::make_unique. If an argument from the std namespace is used, it
+// will cause ADL to find std::make_unique, and an unqualified call to
+// make_unique will be ambiguous. We can work around this by fully qualifying
+// the call (i.e. wabt::make_unique), but it's simpler to just use a different
+// name. It's also more consistent with other names in the wabt namespace,
+// which use CamelCase.
+template <typename T, typename... Args>
+std::unique_ptr<T> MakeUnique(Args&&... args) {
+  return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
+}
+
+}  // namespace wabt
+
+#endif  // WABT_MAKE_UNIQUE_H_