diff --git a/index.bs b/index.bs
index b30aef86..860bef45 100644
--- a/index.bs
+++ b/index.bs
@@ -2047,7 +2047,7 @@ There are three kinds of operation:
 
 If an operation has an identifier but no <emu-t>static</emu-t>
 keyword, then it declares a <dfn id="dfn-regular-operation" export>regular operation</dfn>.
-If the operation has a 
+If the operation has a
 [=special keyword=]
 used in its declaration (that is, any keyword matching
 <emu-nt><a href="#prod-Special">Special</a></emu-nt>, or
@@ -8171,8 +8171,8 @@ a reference to the same object that the IDL value represents.
         1.  Set |offset| to the value of |O|’s \[[ByteOffset]] [=internal slot=].
         1.  Set |length| to the value of |O|’s \[[ByteLength]] [=internal slot=].
     1.  Otherwise, set |length| to the value of |O|’s \[[ArrayBufferByteLength]] [=internal slot=].
-    1.  If <a abstract-op>IsDetachedBuffer</a>(|O|), then
-        [=ECMAScript/throw=] a {{ECMAScript/TypeError}}.
+    1.  If <a abstract-op>IsDetachedBuffer</a>(|arrayBuffer|) is <emu-val>true</emu-val>, then
+        return the empty byte sequence.
     1.  Let |data| be the value of |O|’s \[[ArrayBufferData]] [=internal slot=].
     1.  Return a reference to or copy of (as required) the |length| bytes in |data|
         starting at byte offset |offset|.