| Some timeout -> (* wrap callback setting an handler for ALRM signal and an
alarm that ring after timeout seconds *)
(fun inchan outchan ->
- ignore (Sys.signal Sys.sigalrm (Sys.Signal_handle ~timeout_callback));
+ ignore (Sys.signal Sys.sigalrm (Sys.Signal_handle timeout_callback));
ignore (Unix.alarm timeout);
callback inchan outchan)