diff --git a/ooi/openstack/templates.py b/ooi/openstack/templates.py
index 226fe1a..236b2fb 100644
--- a/ooi/openstack/templates.py
+++ b/ooi/openstack/templates.py
@@ -56,6 +56,10 @@ class OpenStackResourceTemplate(templates.OCCIResourceTemplate):
 
         attrs = attribute.AttributeCollection({a.name: a for a in attrs})
 
+        # occi attribute is an alias for the OpenStack one
+        attrs["occi.compute.ephemeral_storage.size"] = (
+            attrs["org.openstack.flavor.ephemeral"])
+
         location = "%s/%s" % (self._location, id)
         super(OpenStackResourceTemplate, self).__init__(
             id,
diff --git a/ooi/tests/unit/occi/test_openstack.py b/ooi/tests/unit/occi/test_openstack.py
index f196d8f..315abc9 100644
--- a/ooi/tests/unit/occi/test_openstack.py
+++ b/ooi/tests/unit/occi/test_openstack.py
@@ -73,6 +73,7 @@ class TestOpenStackResourceTemplate(base.TestCase):
         for attr in [("occi.compute.cores", cores),
                      ("occi.compute.memory", memory),
                      ("org.openstack.flavor.swap", swap),
+                     ("occi.compute.ephemeral_storage.size", ephemeral),
                      ("org.openstack.flavor.ephemeral", ephemeral),
                      ("org.openstack.flavor.disk", disk)]:
             self.assertEqual(tpl.attributes[attr[0]].default, attr[1])