diff --git a/teuthology/provision/downburst.py b/teuthology/provision/downburst.py
index c605ab97a..97a511ef9 100644
--- a/teuthology/provision/downburst.py
+++ b/teuthology/provision/downburst.py
@@ -216,7 +216,7 @@ def build_config(self):
             'additional-disks-size': machine['volumes']['size'],
             'arch': 'x86_64',
         }
-        fqdn = self.name.split('@')[1]
+        fqdn = self.name.split('@')[-1]
         file_out = {
             'downburst': file_info,
             'local-hostname': fqdn,