diff --git a/js/src/jsfriendapi.h b/js/src/jsfriendapi.h
index 24360a8dcf73..09f224b935b4 100644
--- a/js/src/jsfriendapi.h
+++ b/js/src/jsfriendapi.h
@@ -1464,6 +1464,14 @@ extern JS_FRIEND_API(bool)
 JS_NeuterArrayBuffer(JSContext *cx, JS::HandleObject obj,
                      NeuterDataDisposition changeData);
 
+/*
+ * Check whether the obj is ArrayBufferObject and neutered. Note that this
+ * may return false if a security wrapper is encountered that denies the
+ * unwrapping.
+ */
+extern JS_FRIEND_API(bool)
+JS_IsNeuteredArrayBufferObject(JSObject *obj);
+
 /*
  * Check whether obj supports JS_GetDataView* APIs.
  */
diff --git a/js/src/vm/ArrayBufferObject.cpp b/js/src/vm/ArrayBufferObject.cpp
index e0494733187f..ae6b26eb42fc 100644
--- a/js/src/vm/ArrayBufferObject.cpp
+++ b/js/src/vm/ArrayBufferObject.cpp
@@ -1042,6 +1042,18 @@ JS_NeuterArrayBuffer(JSContext *cx, HandleObject obj,
     return true;
 }
 
+JS_FRIEND_API(bool)
+JS_IsNeuteredArrayBufferObject(JSObject *obj)
+{
+    obj = CheckedUnwrap(obj);
+    if (!obj)
+        return false;
+
+    return obj->is<ArrayBufferObject>()
+           ? obj->as<ArrayBufferObject>().isNeutered()
+           : false;
+}
+
 JS_FRIEND_API(JSObject *)
 JS_NewArrayBuffer(JSContext *cx, uint32_t nbytes)
 {