diff --git a/docs/compatibility.md b/docs/compatibility.md
index 7d1ec47..24756c0 100644
--- a/docs/compatibility.md
+++ b/docs/compatibility.md
@@ -107,6 +107,7 @@ By default, all feature flags are enabled. The following are the feature flags a
 | `TypeError`                                                                                                                                              | ✅[^2]     | ✅[^2]     | ✅[^2]     |
 | `URIError`                                                                                                                                               | ✅[^2]     | ✅[^2]     | ✅[^2]     |
 | `Promise`                                                                                                                                                | ❌         | ✅         | ✅         |
+| `AbortSignal`                                                                                                                                            | ✅[^6]     | ✅[^6]     | ✅[^6]     |
 | [`Iterable`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#the_iterable_protocol)                                | ✅         | ✅         | ✅         |
 | [Well-known symbols](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol#static_properties)                          | ✅         | ✅         | ✅         |
 | [`AsyncIterable`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#the_async_iterator_and_async_iterable_protocols) | ❌         | ✅         | ✅         |
@@ -137,3 +138,4 @@ By default, all feature flags are enabled. The following are the feature flags a
 [^3]: `Feature.AggregateError` must be enabled, otherwise `AggregateError` is serialized into an `Error` instance.
 [^4]: `FormData` is partially supported if it doesn't contain any `Blob` or `File` instances.
 [^5]: Due to the nature of `Blob` and `File` being an async type (in that it returns a `Promise`-based serializable data) while having a sync constructor, it cannot be represented in a way that the type is consistent to its original declaration.
+[^6]: `Feature.AbortSignal` must be enabled, otherwise throws an ``SerovalUnsupportedTypeError`.