diff --git a/install_minimal/upgrades/airtime-2.1.0/common/Version20120411102907.php b/install_minimal/upgrades/airtime-2.1.0/common/Version20120411102907.php
index a1b9c32f4..6e4bb3c6c 100644
--- a/install_minimal/upgrades/airtime-2.1.0/common/Version20120411102907.php
+++ b/install_minimal/upgrades/airtime-2.1.0/common/Version20120411102907.php
@@ -14,18 +14,26 @@ class Version20120411102907 extends AbstractMigration
      */
     public function up(Schema $schema)
     {
-        $this->_addSql("ALTER TABLE cc_files ALTER COLUMN length TYPE interval DEFAULT '00:00:00'");
+        $this->_addSql("ALTER TABLE cc_files ALTER COLUMN length TYPE interval");
+        $this->_addSql("ALTER TABLE cc_files ALTER COLUMN length SET DEFAULT '00:00:00'::interval");
         $this->_addSql("ALTER TABLE cc_files ALTER COLUMN file_exists DROP NOT NULL");
         
-        $this->_addSql("ALTER TABLE cc_playlistcontents ALTER COLUMN cuein TYPE interval DEFAULT '00:00:00'");
-        $this->_addSql("ALTER TABLE cc_playlistcontents ALTER COLUMN cueout TYPE interval DEFAULT '00:00:00'");
-        $this->_addSql("ALTER TABLE cc_playlistcontents ALTER COLUMN cliplength TYPE interval DEFAULT '00:00:00'");
+        $this->_addSql("ALTER TABLE cc_playlistcontents ALTER COLUMN cuein TYPE interval");
+        $this->_addSql("ALTER TABLE cc_playlistcontents ALTER COLUMN cuein SET DEFAULT '00:00:00'");
+        $this->_addSql("ALTER TABLE cc_playlistcontents ALTER COLUMN cueout TYPE interval");
+        $this->_addSql("ALTER TABLE cc_playlistcontents ALTER COLUMN cueout SET DEFAULT '00:00:00'");
+        $this->_addSql("ALTER TABLE cc_playlistcontents ALTER COLUMN cliplength TYPE interval");
+        $this->_addSql("ALTER TABLE cc_playlistcontents ALTER COLUMN cliplength SET DEFAULT '00:00:00'");
         
-        $this->_addSql("ALTER TABLE cc_schedule ALTER COLUMN cue_in TYPE interval DEFAULT '00:00:00'");
-        $this->_addSql("ALTER TABLE cc_schedule ALTER COLUMN cue_out TYPE interval DEFAULT '00:00:00'");
-        $this->_addSql("ALTER TABLE cc_schedule ALTER COLUMN clip_length TYPE interval DEFAULT '00:00:00'");
+        $this->_addSql("ALTER TABLE cc_schedule ALTER COLUMN cue_in TYPE interval");
+        $this->_addSql("ALTER TABLE cc_schedule ALTER COLUMN cue_in SET DEFAULT '00:00:00'");
+        $this->_addSql("ALTER TABLE cc_schedule ALTER COLUMN cue_out TYPE interval");
+        $this->_addSql("ALTER TABLE cc_schedule ALTER COLUMN cue_out SET DEFAULT '00:00:00'");
+        $this->_addSql("ALTER TABLE cc_schedule ALTER COLUMN clip_length TYPE interval");
+        $this->_addSql("ALTER TABLE cc_schedule ALTER COLUMN clip_length SET DEFAULT '00:00:00'");
         
-        $this->_addSql("ALTER TABLE cc_show_instances ALTER COLUMN time_filled TYPE interval DEFAULT '00:00:00'");
+        $this->_addSql("ALTER TABLE cc_show_instances ALTER COLUMN time_filled TYPE interval");
+        $this->_addSql("ALTER TABLE cc_show_instances ALTER COLUMN time_filled set DEFAULT '00:00:00'");
         
         //remove old columns from cc_schedule that deal with groups or playlists.
         $this->_addSql("ALTER TABLE cc_schedule DROP COLUMN group_id");