1 files changed, 6 insertions, 0 deletions
diff --git a/proto.h b/proto.h
index d2022d549d..dde1a43815 100644
--- a/proto.h
+++ b/proto.h
@@ -1823,6 +1823,12 @@ PERL_CALLCONV STRLEN	Perl_is_utf8_char(const U8 *s)
 #define PERL_ARGS_ASSERT_IS_UTF8_CHAR	\
 	assert(s)
 
+PERL_CALLCONV STRLEN	Perl_is_utf8_char_buf(const U8 *buf, const U8 *buf_end)
+			__attribute__nonnull__(1)
+			__attribute__nonnull__(2);
+#define PERL_ARGS_ASSERT_IS_UTF8_CHAR_BUF	\
+	assert(buf); assert(buf_end)
+
 PERL_CALLCONV bool	Perl_is_utf8_cntrl(pTHX_ const U8 *p)
 			__attribute__warn_unused_result__
 			__attribute__nonnull__(pTHX_1);