1 files changed, 1 insertions, 0 deletions

diff --git a/src/lisp.h b/src/lisp.h
index 31c7e50718f..04c1bb91642 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -2323,6 +2323,7 @@ EXFUN (Fstring, MANY);
 extern int chars_in_text P_ ((const unsigned char *, int));
 extern int multibyte_chars_in_text P_ ((const unsigned char *, int));
 extern int multibyte_char_to_unibyte P_ ((int, Lisp_Object));
+extern int multibyte_char_to_unibyte_safe P_ ((int));
 extern Lisp_Object Qcharset;
 extern void init_charset P_ ((void));
 extern void init_charset_once P_ ((void));