diff --git a/archiver/index.d.ts b/archiver/index.d.ts
index f11d0070ef..ea117239ac 100644
--- a/archiver/index.d.ts
+++ b/archiver/index.d.ts
@@ -32,7 +32,7 @@ declare namespace archiver {
 
     export interface Archiver extends STREAM.Transform {
         pipe(writeStream: FS.WriteStream): void;
-        append(source: FS.ReadStream | Buffer | string, name: nameInterface): void;
+        append(source: STREAM.Readable | Buffer | string, name: nameInterface): void;
 
         directory(dirpath: string, destpath: nameInterface | string): void;
         directory(dirpath: string, destpath: nameInterface | string, data: any | Function): void;