diff --git a/compact/tof_barrel.xml b/compact/tof_barrel.xml
index 6d317c1e2e00aab6bd1d8aab4d9cc8783a99665d..bbf1c3c51aae53fe6c19001568215a5f650ab82b 100644
--- a/compact/tof_barrel.xml
+++ b/compact/tof_barrel.xml
@@ -82,7 +82,7 @@
       <layer module="BarrelTOF_Module1" id="1" vis="VertexVis">
         <barrel_envelope
           inner_r="BarrelTOF_rmin1-BarrelTOFLayer_rOffset"
-          _r="BarrelTOF_rmin1-BarrelTOFLayer_rOffset + BarrelTOF_thickness-1.0*mm"
+          outer_r="BarrelTOF_rmin1-BarrelTOFLayer_rOffset + BarrelTOF_thickness-1.0*mm"
           z_length="BarrelTOF_length"/>
         <rphi_layout phi_tilt="10.0*degree" nphi="BarrelTOF_NModules" phi0="0.0" rc="BarrelTOF_rmin1" dr="0.0 * mm"/>
         <z_layout dr="0.0 * mm" z0="0.0 * mm" nz="1"/>
@@ -90,7 +90,7 @@
       <layer module="BarrelTOF_Module2" id="2" vis="VertexVis">
         <barrel_envelope
           inner_r="BarrelTOF_rmin2-BarrelTOFLayer_rOffset"
-          _r="BarrelTOF_rmin2-BarrelTOFLayer_rOffset + BarrelTOF_thickness"
+          outer_r="BarrelTOF_rmin2-BarrelTOFLayer_rOffset + BarrelTOF_thickness"
           z_length="BarrelTOF_length"/>
         <rphi_layout phi_tilt="10.0*degree" nphi="BarrelTOF_NModules" phi0="0.0" rc="BarrelTOF_rmin2" dr="0.0 * mm"/>
         <z_layout dr="0.0 * mm" z0="0.0 * mm" nz="1"/>