diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index d0db9fadcd..acebf1e7fd 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -1388,7 +1388,7 @@ def column_methods_hash #:nodoc:
       def reset_column_information
         undefine_attribute_methods
         @column_names = @columns = @columns_hash = @content_columns = @dynamic_methods_hash = @inheritance_column = nil
-        @arel_engine = @active_relation = @arel_engine = nil
+        @arel_engine = @active_relation = nil
       end
 
       def reset_column_information_and_inheritable_attributes_for_all_subclasses#:nodoc: