diff --git a/plugins/vestige/vestige.cpp b/plugins/vestige/vestige.cpp
index 1d54538b63e..82d4d0407b6 100644
--- a/plugins/vestige/vestige.cpp
+++ b/plugins/vestige/vestige.cpp
@@ -82,11 +82,11 @@ Plugin::Descriptor Q_DECL_EXPORT  vestige_plugin_descriptor =
 }
 
 
-class vstSubWin : public QMdiSubWindow
+class vstSubWin : public SubWindow
 {
 public:
 	vstSubWin( QWidget * _parent ) :
-		QMdiSubWindow( _parent )
+		SubWindow( _parent )
 	{
 		setAttribute( Qt::WA_DeleteOnClose, false );
 		setWindowFlags( Qt::WindowCloseButtonHint );
diff --git a/plugins/vestige/vestige.h b/plugins/vestige/vestige.h
index 3b92eea8ffc..e4ef11fce52 100644
--- a/plugins/vestige/vestige.h
+++ b/plugins/vestige/vestige.h
@@ -29,14 +29,13 @@
 
 #include <QMutex>
 #include <QLayout>
-#include <QMdiSubWindow>
 #include <QScrollArea>
 
 #include "Instrument.h"
 #include "InstrumentView.h"
 #include "Note.h"
 #include "Knob.h"
-
+#include "SubWindow.h"
 #include "AutomatableModel.h"