diff --git a/src/kernel/qdesktopwidget_x11.cpp b/src/kernel/qdesktopwidget_x11.cpp
index 449af4ff..320b2ab0 100644
--- a/src/kernel/qdesktopwidget_x11.cpp
+++ b/src/kernel/qdesktopwidget_x11.cpp
@@ -138,6 +138,9 @@ void TQDesktopWidgetPrivate::init()
     {
 	defaultScreen = DefaultScreen(TQPaintDevice::x11AppDisplay());
 	newScreenCount = ScreenCount(TQPaintDevice::x11AppDisplay());
+	// Some configurations may return inconsistent data for this values
+	if ( defaultScreen < 0 || defaultScreen >= screenCount )
+	    defaultScreen = 0;
         use_xinerama = false;
     }