diff --git a/nsplugins/nspluginloader.cpp b/nsplugins/nspluginloader.cpp
index 3c7fe529b0..36d36a8be8 100644
--- a/nsplugins/nspluginloader.cpp
+++ b/nsplugins/nspluginloader.cpp
@@ -74,6 +74,16 @@ NSPluginInstance::~NSPluginInstance()
 }
 
 
+void NSPluginInstance::windowChanged(WId w)
+{
+    setBackgroundMode(w == 0 ? QWidget::PaletteBackground : QWidget::NoBackground);
+    if (w == 0) {
+        // FIXME: Put a notice here to tell the user that it crashed.
+        repaint();
+    }
+}
+
+
 void NSPluginInstance::resizeEvent(QResizeEvent *event)
 {
   if (shown == false)
diff --git a/nsplugins/nspluginloader.h b/nsplugins/nspluginloader.h
index ac44f43e0f..e74cde73b0 100644
--- a/nsplugins/nspluginloader.h
+++ b/nsplugins/nspluginloader.h
@@ -50,6 +50,7 @@ public:
 
 protected:
     void resizeEvent(QResizeEvent *event);
+    void windowChanged(WId w);
     class NSPluginLoader *_loader;
     bool shown;
 };