diff --git a/ts/export/packer/local.ts b/ts/export/packer/local.ts
index 7d4be50e20..7d207f073d 100644
--- a/ts/export/packer/local.ts
+++ b/ts/export/packer/local.ts
@@ -11,7 +11,7 @@ export class LocalPacker extends Packer {
         this.stream = fs.createWriteStream(path);
     }
    
-   pack() {
+   pack(): void {
        super.pack(this.stream);
    }
 }
\ No newline at end of file