diff --git a/database/migrations/2016_11_16_172119_increase_purchase_cost_size.php b/database/migrations/2016_11_16_172119_increase_purchase_cost_size.php
index 138e4e7b96..a4e0b8b2a3 100644
--- a/database/migrations/2016_11_16_172119_increase_purchase_cost_size.php
+++ b/database/migrations/2016_11_16_172119_increase_purchase_cost_size.php
@@ -45,6 +45,9 @@ class IncreasePurchaseCostSize extends Migration
      */
     public function down()
     {
+        $platform = Schema::getConnection()->getDoctrineSchemaManager()->getDatabasePlatform();
+        $platform->registerDoctrineTypeMapping('enum', 'string');
+
         Schema::table('assets', function ($table) {
             $table->decimal('purchase_cost',  8, 2)->nullable()->default(null)->change();
         });