diff --git a/doc/migrate/3.4.0-4.0.0/README b/doc/migrate/3.4.0-4.0.0/README
index bf51831fef6..003ab37d52e 100644
--- a/doc/migrate/3.4.0-4.0.0/README
+++ b/doc/migrate/3.4.0-4.0.0/README
@@ -6,6 +6,8 @@ if you added or modified some code to the default Tiny ERP distribution.
 
 To migrate a 3.4.0 server to version 4.0.0 you should:
 
+- run "update module list" in tinyERP server 3.4.0 from the administration menu
+
 - stop Tiny ERP server 3.4.0
 
 - backup your database