diff --git a/src/runtime/validation.ts b/src/runtime/validation.ts
index 36ed9f3e..693ef5cf 100644
--- a/src/runtime/validation.ts
+++ b/src/runtime/validation.ts
@@ -9,6 +9,7 @@ type BaseType =
   | typeof Object
   | typeof Array
   | typeof Function
+  | typeof Set
   | true
   | "*";