diff --git a/src/proto/mbyte.pro b/src/proto/mbyte.pro
index 6e85df0..8af1cc2 100644
--- a/src/proto/mbyte.pro
+++ b/src/proto/mbyte.pro
@@ -6,7 +6,7 @@
 int dbcs_class __ARGS((unsigned lead, unsigned trail));
 int latin_char2len __ARGS((int c));
 int latin_char2bytes __ARGS((int c, char_u *buf));
-int latin_ptr2len_check __ARGS((char_u *p));
+int latin_ptr2len __ARGS((char_u *p));
 int utf_char2cells __ARGS((int c));
 int latin_ptr2cells __ARGS((char_u *p));
 int utf_ptr2cells __ARGS((char_u *p));
@@ -18,17 +18,18 @@
 int latin_ptr2char __ARGS((char_u *p));
 int utf_ptr2char __ARGS((char_u *p));
 int mb_ptr2char_adv __ARGS((char_u **pp));
+int mb_cptr2char_adv __ARGS((char_u **pp));
 int arabic_combine __ARGS((int one, int two));
 int arabic_maycombine __ARGS((int two));
 int utf_composinglike __ARGS((char_u *p1, char_u *p2));
 int utfc_ptr2char __ARGS((char_u *p, int *p1, int *p2));
 int utfc_ptr2char_len __ARGS((char_u *p, int *p1, int *p2, int maxlen));
 int utfc_char2bytes __ARGS((int off, char_u *buf));
-int utf_ptr2len_check __ARGS((char_u *p));
+int utf_ptr2len __ARGS((char_u *p));
 int utf_byte2len __ARGS((int b));
-int utf_ptr2len_check_len __ARGS((char_u *p, int size));
-int utfc_ptr2len_check __ARGS((char_u *p));
-int utfc_ptr2len_check_len __ARGS((char_u *p, int size));
+int utf_ptr2len_len __ARGS((char_u *p, int size));
+int utfc_ptr2len __ARGS((char_u *p));
+int utfc_ptr2len_len __ARGS((char_u *p, int size));
 int utf_char2len __ARGS((int c));
 int utf_char2bytes __ARGS((int c, char_u *buf));
 int utf_iscomposing __ARGS((int c));