diff --git a/cfg/main/ma7_cfg.py b/cfg/main/ma7_cfg.py
index a78a1f6..ae7e72b 100644
--- a/cfg/main/ma7_cfg.py
+++ b/cfg/main/ma7_cfg.py
@@ -56,6 +56,7 @@ Mod('mf',
     'frappy_psi.sea.SeaDrivable', '',
     io='sea_main',
     sea_object='mf',
+    value=Param(unit='T'),
 )
 
 Mod('lev',