diff --git a/activerecord/lib/active_record/connection_adapters/column.rb b/activerecord/lib/active_record/connection_adapters/column.rb
index cdbcca3728306fbbd347da220d52c709ad7558b1..01f06af34841d09d2e7f28c11f698ff8b6c5ff83 100644
--- a/activerecord/lib/active_record/connection_adapters/column.rb
+++ b/activerecord/lib/active_record/connection_adapters/column.rb
@@ -64,6 +64,11 @@ def ==(other)
           other.sql_type == sql_type &&
           other.null == null
       end
+      alias :eql? :==
+
+      def hash
+        [self.class, name, default, cast_type, sql_type, null].hash
+      end
     end
   end
   # :startdoc: