diff --git a/lib/closure_tree/finders.rb b/lib/closure_tree/finders.rb
index 3e0a69dd..490efe05 100644
--- a/lib/closure_tree/finders.rb
+++ b/lib/closure_tree/finders.rb
@@ -47,12 +47,12 @@ def find_all_by_generation(generation_level)
     end
 
     def without_self(scope)
-      scope.without(self)
+      scope.without_instance(self)
     end
 
     module ClassMethods
 
-      def without(instance)
+      def without_instance(instance)
         if instance.new_record?
           all
         else