diff --git a/nats/js/kv.py b/nats/js/kv.py
index 2016e07c..b95e09bb 100644
--- a/nats/js/kv.py
+++ b/nats/js/kv.py
@@ -35,6 +35,12 @@
 logger = logging.getLogger(__name__)
 
 
+class StopIterSentinel:
+    """A sentinel class used to indicate that iteration should stop."""
+
+    pass
+
+
 class KeyValue:
     """
     KeyValue uses the JetStream KeyValue functionality.