diff --git a/src/Viewer/WindowBuilder.cxx b/src/Viewer/WindowBuilder.cxx
index a7ef972..b85fee4 100644
--- a/src/Viewer/WindowBuilder.cxx
+++ b/src/Viewer/WindowBuilder.cxx
@@ -98,10 +98,10 @@ void WindowBuilder::makeDefaultTraits(bool stencil)
     traits->samples = fgGetInt("/sim/rendering/multi-samples", traits->samples);
     traits->vsync = fgGetBool("/sim/rendering/vsync-enable", traits->vsync);
     
-    //const bool wantFullscreen = fgGetBool("/sim/startup/fullscreen");
+    const bool wantFullscreen = fgGetBool("/sim/startup/fullscreen");
 
     //zhongjin FullScreen
-    const bool wantFullscreen = true;
+    //const bool wantFullscreen = true;
 
     unsigned screenwidth = 0;
     unsigned screenheight = 0;