diff --git a/compact/tracking/mpgd_outerbarrel.xml b/compact/tracking/mpgd_outerbarrel.xml
index 0da410812..f838e8e8f 100644
--- a/compact/tracking/mpgd_outerbarrel.xml
+++ b/compact/tracking/mpgd_outerbarrel.xml
@@ -149,7 +149,7 @@
 </module>
 <comment> Layout for MPGD DIRC layers </comment>
   <layer module="MPGDOuterBarrelModule" id="0" vis="TrackerSupportVis">
-          <envelope_tolerance r_min="-50*mm" r_max="0*mm" z_min="0*mm" z_max="0*mm"/>
+          <envelope_tolerance r_min="0*mm" r_max="0*mm" z_min="0*mm" z_max="0*mm"/>
     <layer_material surface="inner" binning="binPhi,binZ" bins0="MPGDOuterBarrelModule_count*10" bins1="100" />
     <layer_material surface="outer" binning="binPhi,binZ" bins0="MPGDOuterBarrelModule_count*10" bins1="100" />
     <rphi_layout