diff --git a/typescript-client/s3Types.d.ts b/typescript-client/s3Types.d.ts
index 246ca61fea..4903edc8ff 100644
--- a/typescript-client/s3Types.d.ts
+++ b/typescript-client/s3Types.d.ts
@@ -1,4 +1,7 @@
-export type S3Object = {
+export type S3Object = S3ObjectURI | S3ObjectRecord;
+
+export type S3ObjectURI = `s3://${string}/${string}`;
+export type S3ObjectRecord = {
     s3: string;
     storage?: string;
 };