diff --git a/layout/base/src/nsPluginViewer.cpp b/layout/base/src/nsPluginViewer.cpp
index 2710db97cf95..16142f47b253 100644
--- a/layout/base/src/nsPluginViewer.cpp
+++ b/layout/base/src/nsPluginViewer.cpp
@@ -796,7 +796,7 @@ NS_IMETHODIMP pluginInstanceOwner :: CreateWidget(void)
     }
     else if (nsnull != mWindow)
     {
-      mPluginWindow.window = (nsPluginPort *)mWindow->GetNativeData(NS_NATIVE_WINDOW);
+      mPluginWindow.window = (nsPluginPort *)mWindow->GetNativeData(NS_NATIVE_PLUGIN_PORT);
       mPluginWindow.type = nsPluginWindowType_Window;
     }
     else