diff --git a/spec/frozen/tags/macruby/library/queue/num_waiting_tags.txt b/spec/frozen/tags/macruby/library/queue/num_waiting_tags.txt
index e69de29bb..4b165950b 100644
--- a/spec/frozen/tags/macruby/library/queue/num_waiting_tags.txt
+++ b/spec/frozen/tags/macruby/library/queue/num_waiting_tags.txt
@@ -0,0 +1 @@
+fails:Queue#num_waiting reports the number of threads waiting on the Queue