diff --git a/invokeai/frontend/web/src/features/nodes/util/fieldValueBuilders.ts b/invokeai/frontend/web/src/features/nodes/util/fieldValueBuilders.ts
index ca2513649d3..89d6729f4c3 100644
--- a/invokeai/frontend/web/src/features/nodes/util/fieldValueBuilders.ts
+++ b/invokeai/frontend/web/src/features/nodes/util/fieldValueBuilders.ts
@@ -60,6 +60,7 @@ const FIELD_VALUE_FALLBACK_MAP: {
   UNetField: undefined,
   VaeField: undefined,
   VaeModelField: undefined,
+  Unknown: undefined,
 };
 
 export const buildInputFieldValue = (