diff --git a/src/ui.c b/src/ui.c
index d89c500..cc1ef18 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -3192,7 +3192,7 @@
     while (count < vcol && *ptr != NUL)
     {
 	count += win_lbr_chartabsize(wp, line, ptr, count, NULL);
-	mb_ptr_adv(ptr);
+	MB_PTR_ADV(ptr);
     }
     return (int)(ptr - line);
 }