diff --git a/sw/simulator/launchsitl b/sw/simulator/launchsitl
index 3897a35cdc..eb8115140d 100755
--- a/sw/simulator/launchsitl
+++ b/sw/simulator/launchsitl
@@ -12,22 +12,14 @@ let () =
   try
     let rec loop = fun i ->
       if Sys.argv.(i) = "-a" && (i+1) < n then
-        let ac = Sys.argv.(i+1) in
-        (* Shift other args *)
-        for j = i+2 to n-1 do Sys.argv.(j-2) <- Sys.argv.(j) done;
-        ac
+	let ac = Sys.argv.(i+1) in
+	(* Shift other args *)
+	for j = i+2 to n-1 do Sys.argv.(j-2) <- Sys.argv.(j) done;
+	ac
       else if i = n then raise Not_found
       else loop (i+1) in
     let ac = loop 0 in
-    (*let rec sim_type = fun i ->
-      if Sys.argv.(i) = "-jsbsim" then
-        "jsbsim"
-      else if i = n then "sim"
-      else loop (i+1) in
-    let sim = sim_type 0 in*)
-    let sim = "jsbsim" in
-    let com = paparazzi_home // "var" // ac // sim // "simsitl" in
-    prerr_endline com;
+    let com = paparazzi_home // "var" // ac // "sim/simsitl" in
     if not (Sys.file_exists com) then begin
       Printf.fprintf stderr "Error: '%s' is missing. Build target sim for A/C %s ?\n" com ac;
       exit 1