diff --git a/index.bs b/index.bs
index f3912b51..1549b227 100644
--- a/index.bs
+++ b/index.bs
@@ -8212,7 +8212,7 @@ a [=struct=] with the following [=struct/items=]:
 
 <dfn lt="async iterator" export>Async iterator</dfn> values are represented by a [=struct=] with the following [=struct/items=]:
 
-* <dfn for="JS async iterator">underlying record</dfn>, a [=Iterator=] record
+* <dfn for="JS async iterator">underlying record</dfn>, an [=Iterator=] record
 * <dfn for="JS async iterator">type parameter</dfn>, an IDL type representing the type of values produced by the async iterator
 
 An [=async iterable=] is not directly iterated over. Instead, it is first opened to create
@@ -8232,7 +8232,7 @@ a [=async iterator=]. The [=async iterator=] can be asynchronously iterated over
         [=JS async iterable/object=], |iterable|'s [=JS async iterable/method=]).
     1.  If |iterable|'s [=JS async iterable/type=] is "<code>sync</code>", set |iterator| to
         <a abstract-op>CreateAsyncFromSyncIterator</a>(|iterator|).
-    1.  Return a [=async iterator=] value with [=JS async iterator/underlying record=] set to |iterator| and
+    1.  Return an [=async iterator=] value with [=JS async iterator/underlying record=] set to |iterator| and
         [=JS async iterator/type parameter=] set to |T|.
 
 </div>