diff --git a/index.bs b/index.bs
index 7fff2d1e7..6d97696ab 100644
--- a/index.bs
+++ b/index.bs
@@ -311,7 +311,6 @@ spec:url; type:dfn; text:domain
 spec:url; type:dfn; for:url; text:host
 spec:url; type:dfn; text:valid domain;
 spec:webidl; type:dfn; text:DOMString
-spec:webidl; type:dfn; text:USVString
 spec:webidl; type:interface; text:Promise
 </pre>
 
@@ -7216,10 +7215,10 @@ but the currently used [=RP ID=] might be "example.com".
 :: [=authentication extension|Authentication=]
 
 : Client extension input
-:: A single USVString specifying a FIDO |AppID|.
+:: A single DOMString specifying a FIDO |AppID|.
     <xmp class="idl">
     partial dictionary AuthenticationExtensionsClientInputs {
-      USVString appid;
+      DOMString appid;
     };
     </xmp>
 
@@ -7279,10 +7278,10 @@ During a transition from the FIDO U2F JavaScript API, a [=[RP]=] may have a popu
 :: [=registration extension|Registration=]
 
 : Client extension input
-:: A single USVString specifying a FIDO |AppID|.
+:: A single DOMString specifying a FIDO |AppID|.
     <xmp class="idl">
     partial dictionary AuthenticationExtensionsClientInputs {
-      USVString appidExclude;
+      DOMString appidExclude;
     };
     </xmp>
 
@@ -7441,7 +7440,7 @@ Note: this extension may be implemented for [=authenticators=] that do not use [
 
     dictionary AuthenticationExtensionsPRFInputs {
         AuthenticationExtensionsPRFValues eval;
-        record<USVString, AuthenticationExtensionsPRFValues> evalByCredential;
+        record<DOMString, AuthenticationExtensionsPRFValues> evalByCredential;
     };
 
     partial dictionary AuthenticationExtensionsClientInputs {