diff --git a/packages/bun-types/bun.d.ts b/packages/bun-types/bun.d.ts
index bfe9476bef6aff..8984367863f389 100644
--- a/packages/bun-types/bun.d.ts
+++ b/packages/bun-types/bun.d.ts
@@ -1350,7 +1350,7 @@ declare module "bun" {
      *       sessionToken: tempSessionToken
      *     });
      */
-    sessionToken?: string;
+    sessionToken?: string | null;
 
     /**
      * The S3-compatible service endpoint URL.