diff --git a/src/Gui/Quarter/ContextMenu.cpp b/src/Gui/Quarter/ContextMenu.cpp
index ce17050b9..dc28d9500 100644
--- a/src/Gui/Quarter/ContextMenu.cpp
+++ b/src/Gui/Quarter/ContextMenu.cpp
@@ -33,7 +33,7 @@
 
 #include "ContextMenu.h"
 
-#include <QtGui/QMenu>
+#include <QMenu>
 
 #include <Inventor/SoEventManager.h>
 #include <Inventor/scxml/SoScXMLStateMachine.h>
diff --git a/src/Gui/Quarter/DragDropHandler.cpp b/src/Gui/Quarter/DragDropHandler.cpp
index 28950b8c5..55b4d9ee4 100644
--- a/src/Gui/Quarter/DragDropHandler.cpp
+++ b/src/Gui/Quarter/DragDropHandler.cpp
@@ -44,6 +44,7 @@
 #include <QtCore/QStringList>
 #include <QtGui/QDragEnterEvent>
 #include <QtGui/QDropEvent>
+#include <QMimeData>
 
 #include <Inventor/SoInput.h>
 #include <Inventor/nodes/SoSeparator.h>
diff --git a/src/Gui/Quarter/QuarterWidget.cpp b/src/Gui/Quarter/QuarterWidget.cpp
index 6532cc64f..1cde88be0 100644
--- a/src/Gui/Quarter/QuarterWidget.cpp
+++ b/src/Gui/Quarter/QuarterWidget.cpp
@@ -57,7 +57,7 @@
 #include <QtCore/QEvent>
 #include <QtCore/QDebug>
 #include <QtCore/QFile>
-#include <QtGui/QAction>
+#include <QAction>
 #include <QPaintEvent>
 #include <QResizeEvent>
 
diff --git a/src/Gui/Quarter/QuarterWidgetP.cpp b/src/Gui/Quarter/QuarterWidgetP.cpp
index 45f328ceb..af05bdac0 100644
--- a/src/Gui/Quarter/QuarterWidgetP.cpp
+++ b/src/Gui/Quarter/QuarterWidgetP.cpp
@@ -38,9 +38,9 @@
 #pragma warning(disable : 4267)
 #endif
 
-#include <QtGui/QApplication>
+#include <QApplication>
 #include <QtGui/QCursor>
-#include <QtGui/QMenu>
+#include <QMenu>
 #include <QtCore/QMap>
 
 #include <Inventor/nodes/SoCamera.h>
diff --git a/src/Gui/Quarter/SpaceNavigatorDevice.cpp b/src/Gui/Quarter/SpaceNavigatorDevice.cpp
index b6c2d29fe..42292df5e 100644
--- a/src/Gui/Quarter/SpaceNavigatorDevice.cpp
+++ b/src/Gui/Quarter/SpaceNavigatorDevice.cpp
@@ -36,8 +36,8 @@
 
 #include <Quarter/devices/SpaceNavigatorDevice.h>
 
-#include <QtGui/QApplication>
-#include <QtGui/QWidget>
+#include <QApplication>
+#include <QWidget>
 #include <QtCore/QEvent>
 
 #include <Inventor/events/SoEvent.h>