diff --git a/ba/ba0.cpp b/ba/ba0.cpp
index 1cc159969..bd840144f 100755
--- a/ba/ba0.cpp
+++ b/ba/ba0.cpp
@@ -602,7 +602,7 @@ bool TMenuitem::perform_program() const
         time_t old_time ;
         time( &old_time) ;
         while (  time( (time_t *) 0 ) <= old_time ) do_events();
-        TExternal_app auto_conv("ba1 -0 C");
+        TExternal_app auto_conv("ba1 -0 -C");
         auto_conv.run();
         fp = fopen("conv.his","r");
         if (fp != NULL)