diff --git a/compact/tof_barrel.xml b/compact/tof_barrel.xml
index 36967fa086552f75f3c81d6c5c412ba02295ccb0..c0f4196201315aceb55c7b6ff1f625aa11f555ea 100644
--- a/compact/tof_barrel.xml
+++ b/compact/tof_barrel.xml
@@ -22,7 +22,7 @@
 
       <constant name="BarrelTOFRadius"         value=" 45*cm"/>
       <constant name="BarrelTOFTotalLength"    value="120*cm"/>
-      <constant name="BarrelTOFTotalThickness" value="10*mm"/>
+      <constant name="BarrelTOFTotalThickness" value="50*mm"/>
       <constant name="BarrelTOFModulesNPhi"    value="30"/>
       <constant name="BarrelTOFModulesNZ"      value="6"/>
       <constant name="BarrelTOFModuleWidth"    value="30"/>