===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/grid.c,v
retrieving revision 1.91
retrieving revision 1.92
diff -c -r1.91 -r1.92
*** src/usr.bin/tmux/grid.c	2019/03/20 19:19:11	1.91
--- src/usr.bin/tmux/grid.c	2019/04/01 19:33:38	1.92
***************
*** 1,4 ****
! /* $OpenBSD: grid.c,v 1.91 2019/03/20 19:19:11 nicm Exp $ */
  
  /*
   * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
--- 1,4 ----
! /* $OpenBSD: grid.c,v 1.92 2019/04/01 19:33:38 nicm Exp $ */
  
  /*
   * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
***************
*** 1284,1289 ****
--- 1284,1291 ----
  	if (target->sy < gd->sy)
  		grid_reflow_add(target, gd->sy - target->sy);
  	gd->hsize = target->sy - gd->sy;
+ 	if (gd->hscrolled > gd->hsize)
+ 		gd->hscrolled = gd->hsize;
  	free(gd->linedata);
  	gd->linedata = target->linedata;
  	free(target);