diff --git a/src/proto/mbyte.pro b/src/proto/mbyte.pro
index 88496cc..8c0788c 100644
--- a/src/proto/mbyte.pro
+++ b/src/proto/mbyte.pro
@@ -2,6 +2,7 @@
 int enc_canon_props __ARGS((char_u *name));
 char_u *mb_init __ARGS((void));
 int bomb_size __ARGS((void));
+void remove_bom __ARGS((char_u *s));
 int mb_get_class __ARGS((char_u *p));
 int dbcs_class __ARGS((unsigned lead, unsigned trail));
 int latin_char2len __ARGS((int c));