diff --git a/libs/langgraph/langgraph/pregel/loop.py b/libs/langgraph/langgraph/pregel/loop.py
index 5d02080b0..73bb8f20f 100644
--- a/libs/langgraph/langgraph/pregel/loop.py
+++ b/libs/langgraph/langgraph/pregel/loop.py
@@ -225,6 +225,7 @@ class PregelLoop:
                 self.config,
                 self.step,
                 for_execution=True,
+                manager=None,
             )
             # apply input writes
             apply_writes(