diff --git a/nova/objects/service.py b/nova/objects/service.py
index 46bfbb93a838..f51b3a96f4b2 100644
--- a/nova/objects/service.py
+++ b/nova/objects/service.py
@@ -202,10 +202,12 @@ SERVICE_VERSION_HISTORY = (
 )
 
 # This is used to raise an error at service startup if older than N-1 computes
-# are detected. Update this at the beginning of every release cycle
-OLDEST_SUPPORTED_SERVICE_VERSION = 'Victoria'
+# are detected. Update this at the beginning of every release cycle to point to
+# the smallest service version that was added in N-1.
+OLDEST_SUPPORTED_SERVICE_VERSION = 'Wallaby'
 SERVICE_VERSION_ALIASES = {
     'Victoria': 52,
+    'Wallaby': 54,
 }