diff --git a/src/plugins/qt4projectmanager/qt4project.cpp b/src/plugins/qt4projectmanager/qt4project.cpp
index 625c6091322ca735b99a533e6f6f3e7834d5c7c9..f1d00e163d895bbc07f831e430b5808c92f2fb0d 100644
--- a/src/plugins/qt4projectmanager/qt4project.cpp
+++ b/src/plugins/qt4projectmanager/qt4project.cpp
@@ -234,7 +234,7 @@ void ProjectFilesVisitor::visitFolderNode(FolderNode *folderNode)
 }
 
 // ----------- Qt4ProjectFile
-
+namespace Internal {
 Qt4ProjectFile::Qt4ProjectFile(Qt4Project *project, const QString &filePath, QObject *parent)
     : Core::IFile(parent),
       m_mimeType(QLatin1String(Qt4ProjectManager::Constants::PROFILE_MIMETYPE)),
@@ -308,7 +308,6 @@ bool Qt4ProjectFile::reload(QString *errorString, ReloadFlag flag, ChangeType ty
 }
 
 } // namespace Internal
-
 /*!
   \class Qt4Project
 
@@ -1343,4 +1342,6 @@ void CentralizedFolderWatcher::delayedFolderChanged(const QString &folder)
 //    }
 //}
 
+} // namespace Qt4ProjectManager
+
 #include "qt4project.moc"
diff --git a/src/plugins/qt4projectmanager/qt4project.h b/src/plugins/qt4projectmanager/qt4project.h
index 34af88d8da82643c83efd546cb57275aef60f69a..04de94a5d1aa136959dd4c0a98f1b0c306227365 100644
--- a/src/plugins/qt4projectmanager/qt4project.h
+++ b/src/plugins/qt4projectmanager/qt4project.h
@@ -205,7 +205,7 @@ private:
 
     Internal::CentralizedFolderWatcher *m_centralizedFolderWatcher;
 
-    friend class Qt4ProjectFile;
+    friend class Internal::Qt4ProjectFile;
     friend class Internal::Qt4ProjectConfigWidget;
 };