1 files changed, 1 insertions, 0 deletions
diff --git a/internal/string.h b/internal/string.h
index 29213537ed..5062de4636 100644
--- a/internal/string.h
+++ b/internal/string.h
@@ -38,6 +38,7 @@ VALUE rb_external_str_with_enc(VALUE str, rb_encoding *eenc);
 VALUE rb_str_cat_conv_enc_opts(VALUE newstr, long ofs, const char *ptr, long len,
                                rb_encoding *from, int ecflags, VALUE ecopts);
 VALUE rb_enc_str_scrub(rb_encoding *enc, VALUE str, VALUE repl);
+VALUE rb_str_escape(VALUE str);
 size_t rb_str_memsize(VALUE);
 char *rb_str_to_cstr(VALUE str);
 const char *ruby_escaped_char(int c);