diff --git a/s390x.md b/s390x.md
index c9bfb74..c2b2ca6 100644
--- a/s390x.md
+++ b/s390x.md
@@ -35,7 +35,7 @@ Some related links also at https://github.com/wekan/wekan/wiki/Platforms
 
 1. Install Node.js
 2. scp wekan-VERSION.zip bundle to s390x server, and unzip it
-2. Clone and build Fibers
+2. Clone and build Fibers, copy fibers to bundle, and zip bundle.
 ```
 git clone https://github.com/laverdet/node-fibers
 cd node-fibers