diff --git a/packages/internal/src/marshal.js b/packages/internal/src/marshal.js
index fadbfc5d535..a167cf0ea83 100644
--- a/packages/internal/src/marshal.js
+++ b/packages/internal/src/marshal.js
@@ -72,6 +72,7 @@ harden(assertCapData);
  * @param {string} key
  * @param {ReturnType<typeof import('@endo/marshal').makeMarshal>['fromCapData']} fromCapData
  * @param {number} index index of the desired value in a deserialized stream cell
+ * @return {any}
  */
 export const unmarshalFromVstorage = (data, key, fromCapData, index) => {
   const serialized = data.get(key) || Fail`no data for ${key}`;
diff --git a/packages/vats/tools/board-utils.js b/packages/vats/tools/board-utils.js
index 8bc9fa483dc..c9ee33bb416 100644
--- a/packages/vats/tools/board-utils.js
+++ b/packages/vats/tools/board-utils.js
@@ -49,7 +49,6 @@ export const makeAgoricNamesRemotesFromFakeStorage = fakeStorageKit => {
      *   import('@agoric/vats/tools/board-utils.js').BoardRemote,
      * ][]}
      */
-    // @ts-expect-error cast
     const parts = unmarshalFromVstorage(
       data,
       `published.agoricNames.${kind}`,
@@ -64,7 +63,6 @@ export const makeAgoricNamesRemotesFromFakeStorage = fakeStorageKit => {
   const tables = Object.fromEntries(entries);
   // XXX not part of reverse[]
   const vbankAsset = Object.fromEntries(
-    // @ts-expect-error cast
     unmarshalFromVstorage(
       data,
       `published.agoricNames.vbankAsset`,