diff --git a/focal-fossa-gpu/descriptor.json b/focal-fossa-gpu/descriptor.json
index 100f302..e5aee8c 100644
--- a/focal-fossa-gpu/descriptor.json
+++ b/focal-fossa-gpu/descriptor.json
@@ -17,5 +17,5 @@
     "email":"m.lettere@gmail.com"
   },
   "type":"lxd",
-  "image":"ubuntu:20.04"
+  "image":"focal-fossa-gpu"
 }