diff --git a/spec/index.bs b/spec/index.bs
index e27d516eb..b6b12fa99 100644
--- a/spec/index.bs
+++ b/spec/index.bs
@@ -733,7 +733,7 @@ To <dfn>fetch the accounts list</dfn> given an {{IdentityProviderAPIConfig}} |co
 dictionary IdentityProviderAccount {
   required USVString id;
   required USVString name;
-  required USVString email;
+  USVString email;
   USVString given_name;
   USVString picture;
   sequence<USVString> approved_clients;