diff --git a/lib/replicate/active_record.rb b/lib/replicate/active_record.rb
index 6acdcee..2896a66 100644
--- a/lib/replicate/active_record.rb
+++ b/lib/replicate/active_record.rb
@@ -77,7 +77,7 @@ def replicate_reflection_info(reflection)
         options = reflection.options
         if options[:polymorphic]
           reference_class =
-            if ::ActiveRecord::VERSION::MAJOR == 3 && ::ActiveRecord::VERSION::MINOR > 0
+            if ::ActiveRecord::VERSION::MAJOR >= 3 && ::ActiveRecord::VERSION::MINOR > 0
               attributes[reflection.foreign_type]
             else
               attributes[options[:foreign_type]]