diff --git a/swh/model/model.py b/swh/model/model.py
--- a/swh/model/model.py
+++ b/swh/model/model.py
@@ -199,7 +199,7 @@
 class Release(BaseModel):
     id = attr.ib(type=Sha1Git)
     name = attr.ib(type=bytes)
-    message = attr.ib(type=bytes)
+    comment = attr.ib(type=bytes)
     target = attr.ib(type=Optional[Sha1Git],
                      validator=attr.validators.optional([]))
     target_type = attr.ib(type=ObjectType)