diff --git a/scripts/stampy-signed-upload.js b/scripts/stampy-signed-upload.js
index ff1aa035..846f179e 100755
--- a/scripts/stampy-signed-upload.js
+++ b/scripts/stampy-signed-upload.js
@@ -31,7 +31,7 @@ files
         stdout
           .split('\r')
           .filter((l) => l.includes('upload:'))
-          .join(` \\\n`)
+          .join('-foo-')
       );
     });
   });