1 files changed, 3 insertions, 0 deletions
diff --git a/id.c b/id.c
index b2f346c725..c5d7e3642b 100644
--- a/id.c
+++ b/id.c
@@ -63,4 +63,7 @@ Init_id(void)
 
     idSend = rb_intern("send");
     id__send__ = rb_intern("__send__");
+
+    idRespond_to = rb_intern("respond_to?");
+    idInitialize = rb_intern("initialize");
 }