diff --git a/replicate/identifier.py b/replicate/identifier.py
index 7ca194ac..b5844526 100644
--- a/replicate/identifier.py
+++ b/replicate/identifier.py
@@ -8,7 +8,7 @@
 
 class ModelVersionIdentifier(NamedTuple):
     """
-    A reference to a model version in the format owner/name:version.
+    A reference to a model version in the format owner/name or owner/name:version.
     """
 
     owner: str