diff --git a/src/wndproc.c b/src/wndproc.c
index 7dfe6be..1467bb3 100644
--- a/src/wndproc.c
+++ b/src/wndproc.c
@@ -448,7 +448,7 @@ LRESULT CALLBACK fake_WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
 
         static BOOL initialized = FALSE;
 
-        if (!initialized && LOWORD(lParam) == 503 && HIWORD(lParam) == 309)
+        if (!initialized && (LOWORD(lParam) >= 460 && LOWORD(lParam) <= 540))
         {
             initialized = TRUE;
             dd_SetDisplayMode(513, 319, 32, 0);