Laravelで、 `timestamp` 型はchange()できない

• Laravel 5.1
• Doctrine 2.3

という環境。

Schema::table('users', function (Blueprint $table) {
   $table->timestamp('hogehoge')->create();
});

の後に

Schema::table('users', function (Blueprint $table) {
   $table->timestamp('hogehoge')->nullable()->change();
});

とすると、このような長いエラーを吐く。

  [Doctrine\DBAL\DBALException]                                                                             
  Unknown column type "timestamp" requested. Any Doctrine type that you use has to be registered with \Doc  
  trine\DBAL\Types\Type::addType(). You can get a list of all the known types with \Doctrine\DBAL\Types\Ty  
  pe::getTypesMap(). If this error occurs during database introspection then you might have forgot to regi  
  ster all database types for a Doctrine Type. Use AbstractPlatform#registerDoctrineTypeMapping() or have   
  your custom types implement Type#getMappedDatabaseTypes(). If the type name is empty you might have a pr  
  oblem with the cache or forgot some mapping information.                                                  

Doctrineのエラーだから仕方ないとのこと。

DATETIME型にするしかないか。