diff --git a/gb.qt4/src/CDrawingArea.cpp b/gb.qt4/src/CDrawingArea.cpp
index 2650820da..c277aef03 100644
--- a/gb.qt4/src/CDrawingArea.cpp
+++ b/gb.qt4/src/CDrawingArea.cpp
@@ -386,8 +386,13 @@ void MyDrawingArea::clearBackground()
 	}
 	else
 	{
-		update();
-	}
+#ifndef QT5
+		XClearArea(QX11Info::display(), winId(), 0, 0, 0, 0, True);
+		XFlush(QX11Info::display());
+#else
+ 		update();
+#endif
+ 	}
 }
 
 void MyDrawingArea::resizeEvent(QResizeEvent *e)