diff --git a/PHPCI/Migrations/20140730143702_fix_database_columns.php b/PHPCI/Migrations/20140730143702_fix_database_columns.php
index 809fc878..a1ac2493 100644
--- a/PHPCI/Migrations/20140730143702_fix_database_columns.php
+++ b/PHPCI/Migrations/20140730143702_fix_database_columns.php
@@ -20,7 +20,7 @@ class FixDatabaseColumns extends AbstractMigration
         $build->changeColumn('project_id', 'integer', array('null' => false));
         $build->changeColumn('commit_id', 'string', array('limit' => 50, 'null' => false));
         $build->changeColumn('status', 'integer', array('null' => false));
-        $build->changeColumn('log', 'text', array('null' => true, 'default' => ''));
+        $build->changeColumn('log', 'text', array('null' => true));
         $build->changeColumn('branch', 'string', array('limit' => 50, 'null' => false, 'default' => 'master'));
         $build->changeColumn('created', 'datetime', array('null' => true));
         $build->changeColumn('started', 'datetime', array('null' => true));
diff --git a/PHPCI/Migrations/20150203105015_fix_column_types.php b/PHPCI/Migrations/20150203105015_fix_column_types.php
index f9bcf68a..53db2ad6 100644
--- a/PHPCI/Migrations/20150203105015_fix_column_types.php
+++ b/PHPCI/Migrations/20150203105015_fix_column_types.php
@@ -14,7 +14,6 @@ class FixColumnTypes extends AbstractMigration
         $build = $this->table('build');
         $build->changeColumn('log', 'text', array(
             'null' => true,
-            'default' => '',
             'limit' => MysqlAdapter::TEXT_MEDIUM,
         ));