diff --git a/src/misc2.c b/src/misc2.c
index e03ca49..c5149ff 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -128,7 +128,6 @@
 {
     colnr_T	wcol = wcol_arg;
     int		idx;
-    char_u	*ptr;
     char_u	*line;
     colnr_T	col = 0;
     int		csize = 0;
@@ -158,6 +157,7 @@
     else
     {
 	int width = curwin->w_width - win_col_off(curwin);
+	chartabsize_T cts;
 
 	if (finetune
 		&& curwin->w_p_wrap
@@ -180,19 +180,22 @@
 	    }
 	}
 
-	ptr = line;
-	while (col <= wcol && *ptr != NUL)
+	init_chartabsize_arg(&cts, curwin, pos->lnum, 0, line, line);
+	while (cts.cts_vcol <= wcol && *cts.cts_ptr != NUL)
 	{
 	    // Count a tab for what it's worth (if list mode not on)
 #ifdef FEAT_LINEBREAK
-	    csize = win_lbr_chartabsize(curwin, line, ptr, col, &head);
-	    MB_PTR_ADV(ptr);
+	    csize = win_lbr_chartabsize(&cts, &head);
+	    MB_PTR_ADV(cts.cts_ptr);
 #else
-	    csize = lbr_chartabsize_adv(line, &ptr, col);
+	    csize = lbr_chartabsize_adv(&cts);
 #endif
-	    col += csize;
+	    cts.cts_vcol += csize;
 	}
-	idx = (int)(ptr - line);
+	col = cts.cts_vcol;
+	idx = (int)(cts.cts_ptr - line);
+	clear_chartabsize_arg(&cts);
+
 	/*
 	 * Handle all the special cases.  The virtual_active() check
 	 * is needed to ensure that a virtual position off the end of