diff --git a/sw/supervision/pc_control_panel.ml b/sw/supervision/pc_control_panel.ml
index ca0f464e48..5b5d4cf03d 100644
--- a/sw/supervision/pc_control_panel.ml
+++ b/sw/supervision/pc_control_panel.ml
@@ -170,7 +170,6 @@ let supervision = fun ?file gui log (ac_combo : Gtk_tools.combo) (target_combo :
         | _ -> sprintf "-a %s" ac_name
     in
     let sim_type = get_simtype target_combo in
-    prerr_endline sim_type;
     let args = get_args sim_type ac_name in
     run_and_monitor ?file gui log "Simulator" args
   in