Index: src/bin/psql/command.c
===================================================================
RCS file: /projects/cvsroot/pgsql/src/bin/psql/command.c,v
retrieving revision 1.188
diff -r1.188 command.c
887c887,897
< 		pset.timing = !pset.timing;
---
> 		char	   *opt = psql_scan_slash_option(scan_state,
> 												 OT_NORMAL, NULL, true);
> 		if (opt)
> 		{
> 			if (strcmp(opt, "on") == 0)
> 				pset.timing = true;
> 			else if (strcmp(opt, "off") == 0)
> 				pset.timing = false;
> 		}
> 		else
> 			pset.timing = !pset.timing;