diff --git a/ccserver/jobs.py b/ccserver/jobs.py
index 7863d035763f365e4b20363336b21388d66a5d30..f98b7fa8a062d225b30739d97e2ddc4db3565ba0 100644
--- a/ccserver/jobs.py
+++ b/ccserver/jobs.py
@@ -757,7 +757,9 @@ class CloneJob(BaseMigrationJob):
 
         vm_config = vm_config.replace('<name>%s</name>' % old_name,
                                       '<name>%s</name>' % name)
-        vm_config = re.sub('(<uuid>.*?</uuid>\n)', '', vm_config)
+        vm_config = re.sub('<uuid>.*?</uuid>\n', '', vm_config)
+        # delete MAC address, then it will be regenerated by libvirt
+        vm_config = re.sub('<mac .*?/>\n', '', vm_config)
         for old, new in old_new_name_mapping.iteritems():
             vm_config = vm_config.replace("='%s'" % old,
                                           "='%s'" % new)