diff --git a/engine/schema/src/com/cloud/upgrade/DatabaseUpgradeChecker.java b/engine/schema/src/com/cloud/upgrade/DatabaseUpgradeChecker.java
index 1afd0560f80..6020bbbb86b 100755
--- a/engine/schema/src/com/cloud/upgrade/DatabaseUpgradeChecker.java
+++ b/engine/schema/src/com/cloud/upgrade/DatabaseUpgradeChecker.java
@@ -67,6 +67,7 @@ import com.cloud.upgrade.dao.Upgrade420to430;
 import com.cloud.upgrade.dao.UpgradeSnapshot217to224;
 import com.cloud.upgrade.dao.UpgradeSnapshot223to224;
 import com.cloud.upgrade.dao.VersionDao;
+import com.cloud.upgrade.dao.VersionDaoImpl;
 import com.cloud.upgrade.dao.VersionVO;
 import com.cloud.upgrade.dao.VersionVO.Step;
 import com.cloud.utils.component.SystemIntegrityChecker;
@@ -85,6 +86,8 @@ public class DatabaseUpgradeChecker implements SystemIntegrityChecker {
     VersionDao _dao;
 
     public DatabaseUpgradeChecker() {
+        _dao = new VersionDaoImpl();
+
         _upgradeMap.put("2.1.7", new DbUpgrade[] {new Upgrade217to218(), new Upgrade218to22(), new Upgrade221to222(),
                 new UpgradeSnapshot217to224(), new Upgrade222to224(), new Upgrade224to225(), new Upgrade225to226(),
                 new Upgrade227to228(), new Upgrade228to229(), new Upgrade229to2210(), new Upgrade2210to2211(),