diff --git a/src/reactivity.ts b/src/reactivity.ts
index 29937005..86aede0d 100644
--- a/src/reactivity.ts
+++ b/src/reactivity.ts
@@ -232,6 +232,11 @@ function basicProxyHandler<T extends Target>(callback: Callback): ProxyHandler<T
       if (key === TARGET) {
         return target;
       }
+      // non-writable non-configurable properties cannot be made reactive
+      const desc = Object.getOwnPropertyDescriptor(target, key);
+      if (desc && !desc.writable && !desc.configurable) {
+        return Reflect.get(target, key, proxy);
+      }
       observeTargetKey(target, key, callback);
       return possiblyReactive(Reflect.get(target, key, proxy), callback);
     },
diff --git a/tests/reactivity.test.ts b/tests/reactivity.test.ts
index 7647cf37..8a832024 100644
--- a/tests/reactivity.test.ts
+++ b/tests/reactivity.test.ts
@@ -1095,6 +1095,13 @@ describe("Reactivity", () => {
     expect(n).toBe(1);
     expect(state.k).toEqual({ n: 2 });
   });
+
+  test("can access properties on reactive of frozen objects", async () => {
+    const obj = Object.freeze({ a: {} });
+    const state = createReactive(obj);
+    expect(() => state.a).not.toThrow();
+    expect(state.a).toBe(obj.a);
+  });
 });
 
 describe("Collections", () => {