diff --git a/src/proto/window.pro b/src/proto/window.pro
index 05b6b9d..e091e34 100644
--- a/src/proto/window.pro
+++ b/src/proto/window.pro
@@ -74,8 +74,8 @@
 void restore_snapshot(int idx, int close_curwin);
 int switch_win(win_T **save_curwin, tabpage_T **save_curtab, win_T *win, tabpage_T *tp, int no_display);
 void restore_win(win_T *save_curwin, tabpage_T *save_curtab, int no_display);
-void switch_buffer(buf_T **save_curbuf, buf_T *buf);
-void restore_buffer(buf_T *save_curbuf);
+void switch_buffer(bufref_T *save_curbuf, buf_T *buf);
+void restore_buffer(bufref_T *save_curbuf);
 int win_hasvertsplit(void);
 int match_add(win_T *wp, char_u *grp, char_u *pat, int prio, int id, list_T *pos_list, char_u *conceal_char);
 int match_delete(win_T *wp, int id, int perr);