1 files changed, 5 insertions, 0 deletions
diff --git a/lib/set.rb b/lib/set.rb
index 8364d4a072..b8dd2ca569 100644
--- a/lib/set.rb
+++ b/lib/set.rb
@@ -438,6 +438,11 @@ class SortedSet < Set
     def setup	# :nodoc:
       @@setup and return
 
+      module_eval {
+        # a hack to shut up warning
+        alias old_init initialize
+        remove_method :old_init
+      }
       begin
 	require 'rbtree'