diff --git a/ttd.c b/ttd.c
index eeb0c24523..b551b916b2 100644
--- a/ttd.c
+++ b/ttd.c
@@ -514,7 +514,7 @@ int ttd_main(int argc, char* argv[])
 	//   a letter means: it accepts that param (e.g.: -h)
 	//   a ':' behind it means: it need a param (e.g.: -m<driver>)
 	//   a '::' behind it means: it can optional have a param (e.g.: -d<debug>)
-	#if !defined(__MORPHOS__) && !defined(__AMIGA__)
+	#if !defined(__MORPHOS__) && !defined(__AMIGA__) && !defined(WIN32)
 		optformat = "m:s:v:hDfn::l:eit:d::r:g::G:p:";
 	#else
 		optformat = "m:s:v:hDn::l:eit:d::r:g::G:p:"; // no fork option