1 files changed, 2 insertions, 1 deletions
diff --git a/intern.h b/intern.h
index 1b55522921..7d8b0de130 100644
--- a/intern.h
+++ b/intern.h
@@ -90,7 +90,8 @@ VALUE rb_class_protected_instance_methods _((int, VALUE*, VALUE));
 VALUE rb_class_private_instance_methods _((int, VALUE*, VALUE));
 VALUE rb_obj_singleton_methods _((VALUE));
 void rb_define_method_id _((VALUE, ID, VALUE (*)(), int));
-void rb_undef_method _((VALUE, const char*));
+void rb_frozen_class_p _((VALUE));
+void rb_undef _((VALUE, ID));
 void rb_define_protected_method _((VALUE, const char*, VALUE (*)(), int));
 void rb_define_private_method _((VALUE, const char*, VALUE (*)(), int));
 void rb_define_singleton_method _((VALUE,const char*,VALUE(*)(),int));