diff --git a/invokeai/app/invocations/tiled_stable_diffusion_refine.py b/invokeai/app/invocations/tiled_stable_diffusion_refine.py
index b501912127..0fac95c16c 100644
--- a/invokeai/app/invocations/tiled_stable_diffusion_refine.py
+++ b/invokeai/app/invocations/tiled_stable_diffusion_refine.py
@@ -44,10 +44,10 @@ class TiledStableDiffusionRefine(BaseInvocation):
 
     image: ImageField = InputField(description="Image to be refined.")
 
-    positive_conditioning: ConditioningField | list[ConditioningField] = InputField(
+    positive_conditioning: ConditioningField = InputField(
         description=FieldDescriptions.positive_cond, input=Input.Connection
     )
-    negative_conditioning: ConditioningField | list[ConditioningField] = InputField(
+    negative_conditioning: ConditioningField = InputField(
         description=FieldDescriptions.negative_cond, input=Input.Connection
     )
     noise: LatentsField | None = InputField(