1 files changed, 3 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index 9eea77753d..da821035e0 100644
--- a/internal.h
+++ b/internal.h
@@ -893,6 +893,9 @@ size_t rb_strftime(char *s, size_t maxsize, const char *format, rb_encoding *enc
 /* string.c */
 VALUE rb_fstring(VALUE);
 VALUE rb_fstring_new(const char *ptr, long len);
+#ifdef RUBY_ENCODING_H
+VALUE rb_setup_fake_str(struct RString *fake_str, const char *name, long len, rb_encoding *enc);
+#endif
 int rb_str_buf_cat_escaped_char(VALUE result, unsigned int c, int unicode_p);
 int rb_str_symname_p(VALUE);
 VALUE rb_str_quote_unprintable(VALUE);