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diff --git a/src/tools/clangrefactoringbackend/source/collectincludespreprocessorcallbacks.h b/src/tools/clangrefactoringbackend/source/collectincludespreprocessorcallbacks.h
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+++ b/src/tools/clangrefactoringbackend/source/collectincludespreprocessorcallbacks.h
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#if defined(__GNUC__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+#include <clang/Basic/SourceManager.h>
+#include <clang/Lex/MacroInfo.h>
+#include <clang/Lex/HeaderSearch.h>
+#include <clang/Lex/PPCallbacks.h>
+#include <clang/Lex/Preprocessor.h>
+
+#if defined(__GNUC__)
+#pragma GCC diagnostic pop
+#endif
+
+#include <utils/smallstringvector.h>
+
+#include <algorithm>
+
+#include <QDebug>
+
+namespace ClangBackEnd {
+
+class CollectIncludesPreprocessorCallbacks final : public clang::PPCallbacks
+{
+public:
+    CollectIncludesPreprocessorCallbacks(clang::HeaderSearch &headerSearch,
+                                         Utils::SmallStringVector &includes,
+                                         const std::vector<uint> &excludedIncludeUID,
+                                         std::vector<uint>  &alreadyIncludedFileUIDs)
+        : headerSearch(headerSearch),
+          includes(includes),
+          excludedIncludeUID(excludedIncludeUID),
+          alreadyIncludedFileUIDs(alreadyIncludedFileUIDs)
+    {}
+
+    void InclusionDirective(clang::SourceLocation /*hashLocation*/,
+                            const clang::Token &/*includeToken*/,
+                            llvm::StringRef fileName,
+                            bool /*isAngled*/,
+                            clang::CharSourceRange /*fileNameRange*/,
+                            const clang::FileEntry *file,
+                            llvm::StringRef /*searchPath*/,
+                            llvm::StringRef /*relativePath*/,
+                            const clang::Module */*imported*/) override
+    {
+        auto fileUID = file->getUID();
+
+        flagIncludeAlreadyRead(file);
+
+        if (isNotInExcludedIncludeUID(fileUID)) {
+            auto notAlreadyIncluded = isNotAlreadyIncluded(fileUID);
+            if (notAlreadyIncluded.first) {
+                alreadyIncludedFileUIDs.insert(notAlreadyIncluded.second, file->getUID());
+                includes.emplace_back(fileName.data(), fileName.size());
+            }
+        }
+    }
+
+    bool isNotInExcludedIncludeUID(uint uid) const
+    {
+        return !std::binary_search(excludedIncludeUID.begin(),
+                                   excludedIncludeUID.end(),
+                                   uid);
+    }
+
+
+    std::pair<bool, std::vector<uint>::iterator> isNotAlreadyIncluded(uint uid)
+    {
+        auto range = std::equal_range(alreadyIncludedFileUIDs.begin(),
+                                      alreadyIncludedFileUIDs.end(),
+                                      uid);
+
+        return {range.first == range.second, range.first};
+    }
+
+    void flagIncludeAlreadyRead(const clang::FileEntry *file)
+    {
+        auto &headerFileInfo = headerSearch.getFileInfo(file);
+
+        headerFileInfo.isImport = true;
+        ++headerFileInfo.NumIncludes;
+
+    }
+
+private:
+    clang::HeaderSearch &headerSearch;
+    std::vector<Utils::SmallString>  &includes;
+    const std::vector<uint> &excludedIncludeUID;
+    std::vector<uint>  &alreadyIncludedFileUIDs;
+};
+
+} // namespace ClangBackEnd