diff --git a/index.bs b/index.bs
index af6aa5af..781e5d02 100644
--- a/index.bs
+++ b/index.bs
@@ -10060,7 +10060,7 @@ to discuss this by
 before proceeding.
 
 
-<h4 id="LegacyFactoryFunction" extended-attribute lt="LegacyFactoryFunction">[LegacyFactoryFunction]</h4>
+<h4 id="LegacyFactoryFunction" extended-attribute lt="LegacyFactoryFunction" oldids="NamedConstructor">[LegacyFactoryFunction]</h4>
 
 <p class="advisement">Instead of using this feature, give your interface a [=constructor operation=].</p>
 
@@ -14775,7 +14775,7 @@ terminal symbol <emu-t>const</emu-t>, an
 [=identifier=]
 "<code>A</code>" is distinct from one named "<code>a</code>", and an
 [=extended attribute=]
-[<code class="idl">namedconstructor</code>] will not be recognized as
+[<code class="idl">legacyfactoryfunction</code>] will not be recognized as
 the [{{LegacyFactoryFunction}}]
 extended attribute.