diff --git a/src/libs/cplusplus/CppDocument.cpp b/src/libs/cplusplus/CppDocument.cpp
index b05525b8547..f0c6665a46c 100644
--- a/src/libs/cplusplus/CppDocument.cpp
+++ b/src/libs/cplusplus/CppDocument.cpp
@@ -42,6 +42,7 @@
 
 #include <QtCore/QByteArray>
 #include <QtCore/QBitArray>
+#include <QtCore/QDir>
 #include <QtCore/QtDebug>
 
 /*!
@@ -108,7 +109,7 @@ private:
 
 
 Document::Document(const QString &fileName)
-    : _fileName(fileName),
+    : _fileName(QDir::cleanPath(fileName)),
       _globalNamespace(0),
       _revision(0)
 {
@@ -173,7 +174,7 @@ QStringList Document::includedFiles() const
 
 void Document::addIncludeFile(const QString &fileName, unsigned line)
 {
-    _includes.append(Include(fileName, line));
+    _includes.append(Include(QDir::cleanPath(fileName), line));
 }
 
 void Document::appendMacro(const Macro &macro)
@@ -569,3 +570,8 @@ QStringList Snapshot::dependsOn(const QString &fileName) const
 
     return deps;
 }
+
+Document::Ptr Snapshot::value(const QString &fileName) const
+{
+    return QMap<QString, Document::Ptr>::value(QDir::cleanPath(fileName));
+}
diff --git a/src/libs/cplusplus/CppDocument.h b/src/libs/cplusplus/CppDocument.h
index 596bee794b3..0f879b872d2 100644
--- a/src/libs/cplusplus/CppDocument.h
+++ b/src/libs/cplusplus/CppDocument.h
@@ -341,6 +341,7 @@ public:
     QStringList dependsOn(const QString &fileName) const;
 
     void insert(Document::Ptr doc);
+    Document::Ptr value(const QString &fileName) const;
 
     using _Base::insert;
 
diff --git a/src/libs/cplusplus/FindUsages.cpp b/src/libs/cplusplus/FindUsages.cpp
index d6ecca8cbf9..b74e85995fc 100644
--- a/src/libs/cplusplus/FindUsages.cpp
+++ b/src/libs/cplusplus/FindUsages.cpp
@@ -121,8 +121,7 @@ void FindUsages::reportResult(unsigned tokenIndex)
     const int len = tk.f.length;
 
     if (_future) {
-        const QString path = QDir::toNativeSeparators(_doc->fileName());
-        _future->reportResult(Usage(path, line, lineText, col, len));
+        _future->reportResult(Usage(_doc->fileName(), line, lineText, col, len));
     }
 
     _references.append(tokenIndex);
diff --git a/src/plugins/cpptools/cppfindreferences.cpp b/src/plugins/cpptools/cppfindreferences.cpp
index 72677abf6e2..6d1c527bacd 100644
--- a/src/plugins/cpptools/cppfindreferences.cpp
+++ b/src/plugins/cpptools/cppfindreferences.cpp
@@ -110,7 +110,6 @@ static void find_helper(QFutureInterface<Usage> &future,
     Q_ASSERT(symbolId != 0);
 
     const QString sourceFile = QString::fromUtf8(symbol->fileName(), symbol->fileNameLength());
-
     QStringList files(sourceFile);
 
     if (symbol->isClass() || symbol->isForwardClassDeclaration()) {
@@ -126,9 +125,7 @@ static void find_helper(QFutureInterface<Usage> &future,
     } else {
         files += snapshot.dependsOn(sourceFile);
     }
-
     files.removeDuplicates();
-
     //qDebug() << "done in:" << tm.elapsed() << "number of files to parse:" << files.size();
 
     future.setProgressRange(0, files.size());
@@ -232,7 +229,6 @@ void CppFindReferences::findAll_helper(Symbol *symbol)
     const QMap<QString, QString> wl = _modelManager->workingCopy();
 
     Core::ProgressManager *progressManager = Core::ICore::instance()->progressManager();
-
     QFuture<Usage> result = QtConcurrent::run(&find_helper, wl, snapshot, symbol);
     m_watcher.setFuture(result);
 
diff --git a/src/plugins/cpptools/cppmodelmanager.cpp b/src/plugins/cpptools/cppmodelmanager.cpp
index 5adc395870e..5cae6bdeaf3 100644
--- a/src/plugins/cpptools/cppmodelmanager.cpp
+++ b/src/plugins/cpptools/cppmodelmanager.cpp
@@ -532,7 +532,7 @@ void CppPreprocessor::sourceNeeded(QString &fileName, IncludeType type,
         return;
 
     QString contents = tryIncludeFile(fileName, type);
-
+    fileName = QDir::cleanPath(fileName);
     if (m_currentDoc) {
         m_currentDoc->addIncludeFile(fileName, line);
 
diff --git a/src/plugins/find/searchresulttreemodel.cpp b/src/plugins/find/searchresulttreemodel.cpp
index b711e8c1105..267022bb437 100644
--- a/src/plugins/find/searchresulttreemodel.cpp
+++ b/src/plugins/find/searchresulttreemodel.cpp
@@ -243,7 +243,7 @@ QVariant SearchResultTreeModel::data(const SearchResultFile *file, int role) con
         break;
     case ItemDataRoles::FileNameRole:
     case Qt::ToolTipRole:
-        result = file->fileName();
+        result = QDir::toNativeSeparators(file->fileName());
         break;
     case ItemDataRoles::ResultLinesCountRole:
         result = file->childrenCount();
@@ -270,6 +270,10 @@ QVariant SearchResultTreeModel::headerData(int section, Qt::Orientation orientat
 
 void SearchResultTreeModel::appendResultFile(const QString &fileName)
 {
+#ifdef Q_OS_WIN
+    if (fileName.contains(QLatin1Char('\\')))
+        qWarning("SearchResultTreeModel::appendResultFile: File name with native separators added %s.\n", qPrintable(fileName));
+#endif
     m_lastAppendedResultFile = new SearchResultFile(fileName, m_rootItem);
 
     if (m_showReplaceUI) {