diff --git a/reactos/dll/win32/syssetup/wizard.c b/reactos/dll/win32/syssetup/wizard.c
index d2cd2f1ffce..9f3be0eb77a 100644
--- a/reactos/dll/win32/syssetup/wizard.c
+++ b/reactos/dll/win32/syssetup/wizard.c
@@ -2221,7 +2221,8 @@ ProcessUnattendInf(HINF hUnattendedInf)
 
 
       /* winetests */
-	  hFind = FindFirstFileA("c:\\reactos\\bin\\*.exe", &ffd); /* %windir% isn't working on ros */
+      fprintf(file, "%s\n", "SET WINETEST_PLATFORM=wine");
+      hFind = FindFirstFileA("c:\\reactos\\bin\\*.exe", &ffd); /* %windir% isn't working on ros */
       if (hFind != INVALID_HANDLE_VALUE) 
       {
         do