diff --git a/src/proto/screen.pro b/src/proto/screen.pro
index 84f53e9..84b404d 100644
--- a/src/proto/screen.pro
+++ b/src/proto/screen.pro
@@ -55,6 +55,7 @@
 int number_width(win_T *wp);
 int screen_screencol(void);
 int screen_screenrow(void);
-char *set_chars_option(win_T *wp, char_u **varp, int apply);
+char *set_fillchars_option(win_T *wp, char_u *val, int apply);
+char *set_listchars_option(win_T *wp, char_u *val, int apply);
 char *check_chars_options(void);
 /* vim: set ft=c : */