diff --git a/src/indent.c b/src/indent.c
index 34d3157..1087bad 100644
--- a/src/indent.c
+++ b/src/indent.c
@@ -935,9 +935,7 @@
     int		    bri = 0;
     // window width minus window margin space, i.e. what rests for text
     const int	    eff_wwidth = wp->w_width
-			    - ((wp->w_p_nu || wp->w_p_rnu)
-				&& (vim_strchr(p_cpo, CPO_NUMCOL) == NULL)
-						? number_width(wp) + 1 : 0);
+					  - win_col_off(wp) + win_col_off2(wp);
 
     // In list mode, if 'listchars' "tab" isn't set, a TAB is displayed as ^I.
     int no_ts = wp->w_p_list && wp->w_lcs_chars.tab1 == NUL;