diff --git a/activerecord/lib/active_record/associations/association_collection.rb b/activerecord/lib/active_record/associations/association_collection.rb
index 6303ada87bd47cb64647d865d887a1a0cf2e32a3..6283f3dc281ee66b9ed5a2dfadd3c683d6bea466 100644
--- a/activerecord/lib/active_record/associations/association_collection.rb
+++ b/activerecord/lib/active_record/associations/association_collection.rb
@@ -22,8 +22,8 @@ def to_ary
         @collection.to_ary
       end
   
-      def respond_to?(symbol)
-        proxy_respond_to?(symbol) || [].respond_to?(symbol)
+      def respond_to?(symbol, include_priv = false)
+        proxy_respond_to?(symbol, include_priv) || [].respond_to?(symbol, include_priv)
       end
 
       def loaded?