1 files changed, 1 insertions, 1 deletions
diff --git a/proto.h b/proto.h
index 2a601956f9..1e34c81cec 100644
--- a/proto.h
+++ b/proto.h
@@ -807,7 +807,7 @@ PERL_CALLCONV void	Perl_utilize(pTHX_ int aver, I32 floor, OP* version, OP* id,
 PERL_CALLCONV U8*	Perl_utf16_to_utf8(pTHX_ U8* p, U8 *d, I32 bytelen, I32 *newlen);
 PERL_CALLCONV U8*	Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8 *d, I32 bytelen, I32 *newlen);
 PERL_CALLCONV STRLEN	Perl_utf8_length(pTHX_ U8* s, U8 *e);
-PERL_CALLCONV I32	Perl_utf8_distance(pTHX_ U8 *a, U8 *b);
+PERL_CALLCONV IV	Perl_utf8_distance(pTHX_ U8 *a, U8 *b);
 PERL_CALLCONV U8*	Perl_utf8_hop(pTHX_ U8 *s, I32 off);
 PERL_CALLCONV U8*	Perl_utf8_to_bytes(pTHX_ U8 *s, STRLEN *len);
 PERL_CALLCONV U8*	Perl_bytes_to_utf8(pTHX_ U8 *s, STRLEN *len);