diff --git a/lib/mongoid_spacial/spacial/geo_near_results.rb b/lib/mongoid_spacial/spacial/geo_near_results.rb
index 722fec8..9c49133 100644
--- a/lib/mongoid_spacial/spacial/geo_near_results.rb
+++ b/lib/mongoid_spacial/spacial/geo_near_results.rb
@@ -135,6 +135,11 @@ def next_page
         self.current_page < self.total_pages ? (self.current_page + 1) : nil
       end
 
+      if RUBY_VERSION.to_f < 1.9
+        def sort_by!
+          replace sort_by { |obj| yield obj }
+        end
+      end
     end
   end
 end