diff --git a/include/wx/msw/app.h b/include/wx/msw/app.h
index e29c62f45b..75a6217310 100644
--- a/include/wx/msw/app.h
+++ b/include/wx/msw/app.h
@@ -82,7 +82,7 @@ protected:
 };
 
 int WXDLLEXPORT wxEntry(WXHINSTANCE hInstance, WXHINSTANCE hPrevInstance,
-                        char *lpszCmdLine, int nCmdShow);
+                        wxCmdLineArgType *lpszCmdLine, int nCmdShow);
 
 #endif // _WX_APP_H_