diff --git a/packer-image-buid.groovy b/packer-image-buid.groovy
index 37d6185..8d6c2c5 100644
--- a/packer-image-buid.groovy
+++ b/packer-image-buid.groovy
@@ -291,7 +291,7 @@
                         for (String x : findFiles(glob: "*.*")) {
                             if (x.getName().endsWith('.qcow2')) {
                                 _md5sum = sh(script: "cat ${x}.md5", returnStdout: true).trim().split()[0]
-                                _property = "--property data=${dateTime} --property md5sum=${_md5sum} --property build='${env.BUILD_URL}'"
+                                _property = "--property data=${dateTime} --property md5sum=${_md5sum} --property build='${env.BUILD_URL}' --container-format bare --disk-format qcow2"
                                 _cmdline = String.format("glance image-create --visibility " +
                                         "public %s --name '%s' --file %s", _property, imageName, x)
                                 openstack.runOpenstackCommand(_cmdline, rcFile, openstackEnv)