diff --git a/components/script/dom/abortcontroller.rs b/components/script/dom/abortcontroller.rs
index 7911ad7cf47..3a7ca17220d 100644
--- a/components/script/dom/abortcontroller.rs
+++ b/components/script/dom/abortcontroller.rs
@@ -69,4 +69,10 @@ impl AbortControllerMethods<crate::DomTypeHolder> for AbortController {
         // to signal abort on this with reason if it is given.
         self.signal_abort(cx, reason, can_gc);
     }
+
+    /// <https://dom.spec.whatwg.org/#dom-abortcontroller-signal>
+    fn Signal(&self) -> DomRoot<AbortSignal> {
+        // The signal getter steps are to return this’s signal.
+        self.signal.as_rooted()
+    }
 }
diff --git a/components/script_bindings/webidls/AbortController.webidl b/components/script_bindings/webidls/AbortController.webidl
index cef49010d3c..bb20ec24955 100644
--- a/components/script_bindings/webidls/AbortController.webidl
+++ b/components/script_bindings/webidls/AbortController.webidl
@@ -7,7 +7,7 @@
 interface AbortController {
   constructor();
 
-  //[SameObject] readonly attribute AbortSignal signal;
+  [SameObject] readonly attribute AbortSignal signal;
 
   undefined abort(optional any reason);
 };