1 files changed, 7 insertions, 0 deletions
diff --git a/id.h b/id.h
index c6fa92ff74..75cc7b1a6c 100644
--- a/id.h
+++ b/id.h
@@ -52,4 +52,11 @@ extern ID idSend;
 extern ID id__send__;
 extern ID idRespond_to;
 extern ID idInitialize;
+
+extern ID id_core_set_method_alias;
+extern ID id_core_set_variable_alias;
+extern ID id_core_undef_method;
+extern ID id_core_define_method;
+extern ID id_core_define_singleton_method;
+
 #endif /* RUBY_ID_H */