diff --git a/ext/ripper/ripper_init.h b/ext/ripper/ripper_init.h
index e9e7bc7e5f..664bb7bce3 100644
--- a/ext/ripper/ripper_init.h
+++ b/ext/ripper/ripper_init.h
@@ -2,8 +2,6 @@
 #define RIPPER_INIT_H
 
 extern VALUE rb_ripper_none;
-VALUE ripper_get_value(VALUE v);
-ID ripper_get_id(VALUE v);
 PRINTF_ARGS(void ripper_compile_error(struct parser_params*, const char *fmt, ...), 2, 3);
 
 #endif /* RIPPER_INIT_H */