1 files changed, 2 insertions, 2 deletions
diff --git a/proc.c b/proc.c
index 805f7b9603..48d7dcb490 100644
--- a/proc.c
+++ b/proc.c
@@ -1528,7 +1528,8 @@ rb_obj_singleton_method(VALUE obj, VALUE vid)
 			  QUOTE(vid), obj);
     }
     if (NIL_P(klass = rb_singleton_class_get(obj)) ||
-	!(me = rb_method_entry_at(klass, id))) {
+	UNDEFINED_METHOD_ENTRY_P(me = rb_method_entry_at(klass, id)) ||
+	UNDEFINED_REFINED_METHOD_P(me->def)) {
 	rb_name_error(id, "undefined singleton method `%"PRIsVALUE"' for `%"PRIsVALUE"'",
 		      QUOTE_ID(id), obj);
     }
@@ -2831,4 +2832,3 @@ Init_Binding(void)
     rb_define_method(rb_cBinding, "receiver", bind_receiver, 0);
     rb_define_global_function("binding", rb_f_binding, 0);
 }
-