diff --git a/daft/daft/__init__.pyi b/daft/daft/__init__.pyi
index 65f6439eb0..4d3c4d85c9 100644
--- a/daft/daft/__init__.pyi
+++ b/daft/daft/__init__.pyi
@@ -1792,7 +1792,7 @@ class LogicalPlanBuilder:
         kwargs: dict[str, Any] | None = None,
     ) -> LogicalPlanBuilder: ...
     def schema(self) -> PySchema: ...
-    def optimize(self, execution_config: PyDaftExecutionConfig | None = None) -> LogicalPlanBuilder: ...
+    def optimize(self, execution_config: PyDaftExecutionConfig | None) -> LogicalPlanBuilder: ...
     def to_physical_plan_scheduler(self, cfg: PyDaftExecutionConfig) -> PhysicalPlanScheduler: ...
     def to_adaptive_physical_plan_scheduler(self, cfg: PyDaftExecutionConfig) -> AdaptivePhysicalPlanScheduler: ...
     def repr_ascii(self, simple: bool) -> str: ...