diff --git a/packages/synapse-react-client/src/components/DownloadCart/DownloadListTable.tsx b/packages/synapse-react-client/src/components/DownloadCart/DownloadListTable.tsx
index 8c9c91467f..ea2bf7878a 100644
--- a/packages/synapse-react-client/src/components/DownloadCart/DownloadListTable.tsx
+++ b/packages/synapse-react-client/src/components/DownloadCart/DownloadListTable.tsx
@@ -322,7 +322,7 @@ export default function DownloadListTable(props: DownloadListTableProps) {
                               associatedObjectType={
                                 FileHandleAssociateType.FileEntity
                               }
-                              entityVersionNumber={item.versionNumber.toString()}
+                              entityVersionNumber={item.versionNumber?.toString()}
                               displayFileName={false}
                               onClickCallback={(isExternalLink: boolean) => {
                                 // SWC-5944: remove the item from the download list, unless it's an external link.
diff --git a/packages/synapse-types/src/DownloadListV2/DownloadListItemResult.ts b/packages/synapse-types/src/DownloadListV2/DownloadListItemResult.ts
index 344ef300f3..1437c2a92d 100644
--- a/packages/synapse-types/src/DownloadListV2/DownloadListItemResult.ts
+++ b/packages/synapse-types/src/DownloadListV2/DownloadListItemResult.ts
@@ -9,6 +9,6 @@ export type DownloadListItemResult = {
   createdOn: string //The date-time when this file was created.
   fileSizeBytes: number //The size of the file in bytes.
   fileEntityId: string //The 'syn' identifier of a file entity.
-  versionNumber: number //When included, indicates that a specific version of a files was added to the user's download list. When excluded, the current version was added.
+  versionNumber?: number //When included, indicates that a specific version of a files was added to the user's download list. When excluded, the current version was added.
   isEligibleForPackaging: boolean //Only files that are managed by Synapse storage are eligible for packaging into a zip file. If true, then the file is eligible for packaging into a zip file.
 }