diff --git a/packages/runtime-core/src/componentOptions.ts b/packages/runtime-core/src/componentOptions.ts
index 2bd8b329732..3b3516ed5a2 100644
--- a/packages/runtime-core/src/componentOptions.ts
+++ b/packages/runtime-core/src/componentOptions.ts
@@ -429,10 +429,10 @@ export type StrictUnwrapAttrsType<
 > = [keyof T] extends [never]
   ? Record<string, unknown>
   : T extends new () => { $props: infer P }
-  ? NonNullable<P>
+  ? Readonly<NonNullable<P>>
   : T extends (props: infer P, ...args: any) => any
-  ? NonNullable<P>
-  : T
+  ? Readonly<NonNullable<P>>
+  : Readonly<T>
 
 export type ObjectWatchOptionItem = {
   handler: WatchCallback | string