diff --git a/permchain/checkpoint/memory.py b/permchain/checkpoint/memory.py
index 12d3a2932..7920291ab 100644
--- a/permchain/checkpoint/memory.py
+++ b/permchain/checkpoint/memory.py
@@ -19,6 +19,7 @@ class MemoryCheckpoint(BaseCheckpointAdapter):
                 name="Thread ID",
                 description=None,
                 default="",
+                is_shared=True,
             ),
         ]