diff --git a/gui-lib/mred/private/wx/platform.rkt b/gui-lib/mred/private/wx/platform.rkt
index 9c640fd9..aa21f881 100644
--- a/gui-lib/mred/private/wx/platform.rkt
+++ b/gui-lib/mred/private/wx/platform.rkt
@@ -1,13 +1,15 @@
 #lang racket/base
 (require racket/runtime-path 
-         (for-syntax racket/base))
+         setup/cross-system
+         (for-syntax racket/base
+                     setup/cross-system))
 (provide 
  (protect-out (all-defined-out)))
 
 (define-runtime-module-path-index platform-lib
   (let ([gtk-lib
          '(lib "mred/private/wx/gtk/platform.rkt")])
-    (case (system-type)
+    (case (cross-system-type)
       [(windows) (if (getenv "PLT_WIN_GTK")
                      gtk-lib
                      '(lib "mred/private/wx/win32/platform.rkt"))]