diff --git a/python_modules/dagster/dagster/_core/execution/context/compute.py b/python_modules/dagster/dagster/_core/execution/context/compute.py
index 2fafc2383e4de..4d2e23e394fe8 100644
--- a/python_modules/dagster/dagster/_core/execution/context/compute.py
+++ b/python_modules/dagster/dagster/_core/execution/context/compute.py
@@ -1468,7 +1468,7 @@ def latest_materialization_event(
 
         Returns: Optional[AssetMaterialization]
         """
-        return self._step_execution_context.upstream_asset_materialization_events.get(
+        return self.op_execution_context._step_execution_context.upstream_asset_materialization_events.get(  # noqa: SLF001
             AssetKey.from_coercible(key)
         )