diff --git a/index.bs b/index.bs
index 1885eac4..ad0bb0ef 100644
--- a/index.bs
+++ b/index.bs
@@ -640,7 +640,7 @@ in the declaration:
* For [=operations=], the
ArgumentNameKeyword : + "async" "attribute" "callback" "const" @@ -1976,6 +1977,7 @@ are applicable only to regular attributes:AttributeNameKeyword : + "async" "required"@@ -2420,15 +2422,26 @@ The following extended attributes are applicable to operations:OperationRest : - OptionalIdentifier "(" ArgumentList ")" ";" + OptionalOperationName "(" ArgumentList ")" ";"-- OptionalIdentifier : - identifier ++ OptionalOperationName : + OperationName ε++ OperationName : + OperationNameKeyword + identifier ++ ++ OperationNameKeyword : + "includes" ++ArgumentList : Argument Arguments