diff --git a/src/plugins/projectexplorer/customparserconfigdialog.cpp b/src/plugins/projectexplorer/customparserconfigdialog.cpp
index c236abe1a54..b45c745c8f9 100644
--- a/src/plugins/projectexplorer/customparserconfigdialog.cpp
+++ b/src/plugins/projectexplorer/customparserconfigdialog.cpp
@@ -33,6 +33,9 @@
 #include <QPushButton>
 #include <QRegExp>
 
+namespace ProjectExplorer {
+namespace Internal {
+
 CustomParserConfigDialog::CustomParserConfigDialog(QDialog *parent) :
     QDialog(parent),
     ui(new Ui::CustomParserConfigDialog)
@@ -165,3 +168,6 @@ void CustomParserConfigDialog::changed()
     ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(true);
     m_dirty = true;
 }
+
+} // namespace Internal
+} // namespace ProjectExplorer
diff --git a/src/plugins/projectexplorer/customparserconfigdialog.h b/src/plugins/projectexplorer/customparserconfigdialog.h
index 53d9d6fec49..1f0e43be832 100644
--- a/src/plugins/projectexplorer/customparserconfigdialog.h
+++ b/src/plugins/projectexplorer/customparserconfigdialog.h
@@ -34,9 +34,10 @@
 
 #include <QDialog>
 
-QT_BEGIN_NAMESPACE
+namespace ProjectExplorer {
+namespace Internal {
+
 namespace Ui { class CustomParserConfigDialog; }
-QT_END_NAMESPACE
 
 class CustomParserConfigDialog : public QDialog
 {
@@ -67,4 +68,7 @@ private:
     bool m_dirty;
 };
 
+} // namespace Internal
+} // namespace ProjectExplorer
+
 #endif // CUSTOMPARSERCONFIGDIALOG_H
diff --git a/src/plugins/projectexplorer/customparserconfigdialog.ui b/src/plugins/projectexplorer/customparserconfigdialog.ui
index 09e37db5b57..86f8bde7621 100644
--- a/src/plugins/projectexplorer/customparserconfigdialog.ui
+++ b/src/plugins/projectexplorer/customparserconfigdialog.ui
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
- <class>CustomParserConfigDialog</class>
- <widget class="QDialog" name="CustomParserConfigDialog">
+ <class>ProjectExplorer::Internal::CustomParserConfigDialog</class>
+ <widget class="QDialog" name="ProjectExplorer::Internal::CustomParserConfigDialog">
   <property name="geometry">
    <rect>
     <x>0</x>
@@ -211,7 +211,7 @@
   <connection>
    <sender>buttonBox</sender>
    <signal>accepted()</signal>
-   <receiver>CustomParserConfigDialog</receiver>
+   <receiver>ProjectExplorer::Internal::CustomParserConfigDialog</receiver>
    <slot>accept()</slot>
    <hints>
     <hint type="sourcelabel">
@@ -227,7 +227,7 @@
   <connection>
    <sender>buttonBox</sender>
    <signal>rejected()</signal>
-   <receiver>CustomParserConfigDialog</receiver>
+   <receiver>ProjectExplorer::Internal::CustomParserConfigDialog</receiver>
    <slot>reject()</slot>
    <hints>
     <hint type="sourcelabel">