diff --git a/xcat-inventory/xcclient/inventory/dbsession.py b/xcat-inventory/xcclient/inventory/dbsession.py
index 42332ca..d4eeec1 100644
--- a/xcat-inventory/xcclient/inventory/dbsession.py
+++ b/xcat-inventory/xcclient/inventory/dbsession.py
@@ -12,7 +12,9 @@
 import os
 import sqlalchemy.exc
 from exceptions import *
+import codecs
 
+codecs.register(lambda name: codecs.lookup('utf8') if name == 'utf8mb4' else None)
 
 Base = declarative_base()
 Base.metadata.bind = None;