diff --git a/src/proto/diff.pro b/src/proto/diff.pro
index 3234fde..c7a7ebe 100644
--- a/src/proto/diff.pro
+++ b/src/proto/diff.pro
@@ -1,27 +1,27 @@
 /* diff.c */
-void diff_buf_delete __ARGS((buf_T *buf));
-void diff_buf_adjust __ARGS((win_T *win));
-void diff_buf_add __ARGS((buf_T *buf));
-void diff_invalidate __ARGS((buf_T *buf));
-void diff_mark_adjust __ARGS((linenr_T line1, linenr_T line2, long amount, long amount_after));
-void ex_diffupdate __ARGS((exarg_T *eap));
-void ex_diffpatch __ARGS((exarg_T *eap));
-void ex_diffsplit __ARGS((exarg_T *eap));
-void ex_diffthis __ARGS((exarg_T *eap));
-void diff_win_options __ARGS((win_T *wp, int addbuf));
-void ex_diffoff __ARGS((exarg_T *eap));
-void diff_clear __ARGS((tabpage_T *tp));
-int diff_check __ARGS((win_T *wp, linenr_T lnum));
-int diff_check_fill __ARGS((win_T *wp, linenr_T lnum));
-void diff_set_topline __ARGS((win_T *fromwin, win_T *towin));
-int diffopt_changed __ARGS((void));
-int diffopt_horizontal __ARGS((void));
-int diff_find_change __ARGS((win_T *wp, linenr_T lnum, int *startp, int *endp));
-int diff_infold __ARGS((win_T *wp, linenr_T lnum));
-void nv_diffgetput __ARGS((int put, long count));
-void ex_diffgetput __ARGS((exarg_T *eap));
-int diff_mode_buf __ARGS((buf_T *buf));
-int diff_move_to __ARGS((int dir, long count));
-linenr_T diff_get_corresponding_line __ARGS((buf_T *buf1, linenr_T lnum1, buf_T *buf2, linenr_T lnum3));
-linenr_T diff_lnum_win __ARGS((linenr_T lnum, win_T *wp));
+void diff_buf_delete(buf_T *buf);
+void diff_buf_adjust(win_T *win);
+void diff_buf_add(buf_T *buf);
+void diff_invalidate(buf_T *buf);
+void diff_mark_adjust(linenr_T line1, linenr_T line2, long amount, long amount_after);
+void ex_diffupdate(exarg_T *eap);
+void ex_diffpatch(exarg_T *eap);
+void ex_diffsplit(exarg_T *eap);
+void ex_diffthis(exarg_T *eap);
+void diff_win_options(win_T *wp, int addbuf);
+void ex_diffoff(exarg_T *eap);
+void diff_clear(tabpage_T *tp);
+int diff_check(win_T *wp, linenr_T lnum);
+int diff_check_fill(win_T *wp, linenr_T lnum);
+void diff_set_topline(win_T *fromwin, win_T *towin);
+int diffopt_changed(void);
+int diffopt_horizontal(void);
+int diff_find_change(win_T *wp, linenr_T lnum, int *startp, int *endp);
+int diff_infold(win_T *wp, linenr_T lnum);
+void nv_diffgetput(int put, long count);
+void ex_diffgetput(exarg_T *eap);
+int diff_mode_buf(buf_T *buf);
+int diff_move_to(int dir, long count);
+linenr_T diff_get_corresponding_line(buf_T *buf1, linenr_T lnum1, buf_T *buf2, linenr_T lnum3);
+linenr_T diff_lnum_win(linenr_T lnum, win_T *wp);
 /* vim: set ft=c : */