diff --git a/index.ts b/index.ts
index 5616684..1844501 100644
--- a/index.ts
+++ b/index.ts
@@ -58,11 +58,19 @@ export async function pSignal<T>(
 }
 
 export function isAbortError(value: unknown): value is Error {
+    // checking for "TimeoutError" as well because of AbortSignal.timeout(time):
+    // https://developer.mozilla.org/en-US/docs/Web/API/AbortSignal/timeout
+
     if (typeof DOMException === 'undefined') {
-        return value instanceof Error && value.name === 'AbortError'
+        return (
+            value instanceof Error && (value.name === 'AbortError' || value.name === 'TimeoutError')
+        )
     }
 
-    return value instanceof DOMException && value.name === 'AbortError'
+    return (
+        value instanceof DOMException &&
+        (value.name === 'AbortError' || value.name === 'TimeoutError')
+    )
 }
 
 function createAbortError(): Error {