diff --git a/src/proto/buffer.pro b/src/proto/buffer.pro
index e14ee8f..a5fe42f 100644
--- a/src/proto/buffer.pro
+++ b/src/proto/buffer.pro
@@ -37,13 +37,12 @@
 int otherfile __ARGS((char_u *ffname));
 void buf_setino __ARGS((buf_T *buf));
 void fileinfo __ARGS((int fullname, int shorthelp, int dont_truncate));
-void col_print __ARGS((char_u *buf, int col, int vcol));
+void col_print __ARGS((char_u *buf, size_t buflen, int col, int vcol));
 void maketitle __ARGS((void));
 void resettitle __ARGS((void));
 void free_titles __ARGS((void));
 int build_stl_str_hl __ARGS((win_T *wp, char_u *out, size_t outlen, char_u *fmt, int use_sandbox, int fillchar, int maxwidth, struct stl_hlrec *hltab, struct stl_hlrec *tabtab));
-void get_rel_pos __ARGS((win_T *wp, char_u *str));
-int append_arg_number __ARGS((win_T *wp, char_u *buf, int add_file, int maxlen));
+void get_rel_pos __ARGS((win_T *wp, char_u *buf, int buflen));
 char_u *fix_fname __ARGS((char_u *fname));
 void fname_expand __ARGS((buf_T *buf, char_u **ffname, char_u **sfname));
 char_u *alist_name __ARGS((aentry_T *aep));
@@ -54,8 +53,8 @@
 void write_viminfo_bufferlist __ARGS((FILE *fp));
 char *buf_spname __ARGS((buf_T *buf));
 void buf_addsign __ARGS((buf_T *buf, int id, linenr_T lnum, int typenr));
-int buf_change_sign_type __ARGS((buf_T *buf, int markId, int typenr));
-int_u buf_getsigntype __ARGS((buf_T *buf, linenr_T lnum, int type));
+linenr_T buf_change_sign_type __ARGS((buf_T *buf, int markId, int typenr));
+int buf_getsigntype __ARGS((buf_T *buf, linenr_T lnum, int type));
 linenr_T buf_delsign __ARGS((buf_T *buf, int id));
 int buf_findsign __ARGS((buf_T *buf, int id));
 int buf_findsign_id __ARGS((buf_T *buf, linenr_T lnum));