diff --git a/src/proto/charset.pro b/src/proto/charset.pro
index 72eed4b..fc7769c 100644
--- a/src/proto/charset.pro
+++ b/src/proto/charset.pro
@@ -16,7 +16,7 @@
 int chartabsize __ARGS((char_u *p, colnr_T col));
 int linetabsize __ARGS((char_u *s));
 int linetabsize_col __ARGS((int startcol, char_u *s));
-int win_linetabsize __ARGS((win_T *wp, char_u *p, colnr_T len));
+int win_linetabsize __ARGS((win_T *wp, char_u *line, colnr_T len));
 int vim_isIDc __ARGS((int c));
 int vim_iswordc __ARGS((int c));
 int vim_iswordc_buf __ARGS((int c, buf_T *buf));
@@ -26,9 +26,9 @@
 int vim_isfilec_or_wc __ARGS((int c));
 int vim_isprintc __ARGS((int c));
 int vim_isprintc_strict __ARGS((int c));
-int lbr_chartabsize __ARGS((unsigned char *s, colnr_T col));
-int lbr_chartabsize_adv __ARGS((char_u **s, colnr_T col));
-int win_lbr_chartabsize __ARGS((win_T *wp, char_u *s, colnr_T col, int *headp));
+int lbr_chartabsize __ARGS((char_u *line, unsigned char *s, colnr_T col));
+int lbr_chartabsize_adv __ARGS((char_u *line, char_u **s, colnr_T col));
+int win_lbr_chartabsize __ARGS((win_T *wp, char_u *line, char_u *s, colnr_T col, int *headp));
 int in_win_border __ARGS((win_T *wp, colnr_T vcol));
 void getvcol __ARGS((win_T *wp, pos_T *pos, colnr_T *start, colnr_T *cursor, colnr_T *end));
 colnr_T getvcol_nolist __ARGS((pos_T *posp));