diff --git a/types/rss/index.d.ts b/types/rss/index.d.ts
index bd5653bf8f..7de1fab2aa 100644
--- a/types/rss/index.d.ts
+++ b/types/rss/index.d.ts
@@ -90,7 +90,7 @@ declare namespace NodeRSS {
         /**
          * Path to binary file (or URL).
          */
-        file: string;
+        file?: string;
         /**
          * Size of the file.
          */