diff --git a/Extras/SystemHeatBoiloff/CryoTanks/CryoTanksSystemHeat.cfg b/Extras/SystemHeatBoiloff/CryoTanks/CryoTanksSystemHeat.cfg
index 4e0ed20..5e10f2e 100644
--- a/Extras/SystemHeatBoiloff/CryoTanks/CryoTanksSystemHeat.cfg
+++ b/Extras/SystemHeatBoiloff/CryoTanks/CryoTanksSystemHeat.cfg
@@ -4,7 +4,7 @@
   {
     name = ModuleSystemHeat
     volume = #$../mass$
-    volume *= 0.5
+    @volume *= 0.5
     moduleID = tank
     iconName = Icon_Snow
   }