===================================================================
RCS file: /cvs/mandoc/out.c,v
retrieving revision 1.68
retrieving revision 1.69
diff -u -p -r1.68 -r1.69
--- mandoc/out.c	2017/06/14 18:23:37	1.68
+++ mandoc/out.c	2017/06/15 00:27:52	1.69
@@ -1,4 +1,4 @@
-/*	$Id: out.c,v 1.68 2017/06/14 18:23:37 schwarze Exp $ */
+/*	$Id: out.c,v 1.69 2017/06/15 00:27:52 schwarze Exp $ */
 /*
  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2011, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -157,7 +157,8 @@ tblcalc(struct rofftbl *tbl, const struct tbl_span *sp
 			tblcalc_data(tbl, col, opts, dp,
 			    dp->block == 0 ? 0 :
 			    dp->layout->width ? dp->layout->width :
-			    rmargin ? rmargin / (sp->opts->cols + 1) : 0);
+			    rmargin ? (rmargin + sp->opts->cols / 2)
+			    / (sp->opts->cols + 1) : 0);
 		}
 	}