===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/mandoc/roff.c,v
retrieving revision 1.115
retrieving revision 1.116
diff -c -r1.115 -r1.116
*** src/usr.bin/mandoc/roff.c	2014/12/16 23:44:16	1.115
--- src/usr.bin/mandoc/roff.c	2014/12/18 17:43:07	1.116
***************
*** 1,4 ****
! /*	$OpenBSD: roff.c,v 1.115 2014/12/16 23:44:16 schwarze Exp $ */
  /*
   * Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
   * Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
--- 1,4 ----
! /*	$OpenBSD: roff.c,v 1.116 2014/12/18 17:43:07 schwarze Exp $ */
  /*
   * Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
   * Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
***************
*** 1574,1580 ****
  			*res *= operand2;
  			break;
  		case '/':
! 			if (0 == operand2) {
  				mandoc_msg(MANDOCERR_DIVZERO,
  					r->parse, ln, *pos, v);
  				*res = 0;
--- 1574,1580 ----
  			*res *= operand2;
  			break;
  		case '/':
! 			if (operand2 == 0) {
  				mandoc_msg(MANDOCERR_DIVZERO,
  					r->parse, ln, *pos, v);
  				*res = 0;
***************
*** 1583,1588 ****
--- 1583,1594 ----
  			*res /= operand2;
  			break;
  		case '%':
+ 			if (operand2 == 0) {
+ 				mandoc_msg(MANDOCERR_DIVZERO,
+ 					r->parse, ln, *pos, v);
+ 				*res = 0;
+ 				break;
+ 			}
  			*res %= operand2;
  			break;
  		case '<':