diff --git a/geometry/mollerMother.gdml b/geometry/mollerMother.gdml
index 8017296f6..68cf1f9ed 100644
--- a/geometry/mollerMother.gdml
+++ b/geometry/mollerMother.gdml
@@ -19,7 +19,7 @@
   <solids>
     &world;
     
-    <cone name="solidCollar2_InnerRing" lunit="mm" aunit="rad" startphi="0" deltaphi="2*pi" rmin1="1010" rmax1="1146.35" rmin2="1019" rmax2="1146.35" z="100+50"/> <!--the information of the inner ring is taken from Chandan Ghosh-->
+    <cone name="solidCollar2_InnerRing" lunit="mm" aunit="rad" startphi="0" deltaphi="2*pi" rmin1="1010" rmax1="1146.35" rmin2="1021.54" rmax2="1146.35" z="100+50"/> <!--the information of the inner ring is taken from Chandan Ghosh-->
     <cone name="solidCollar2_OuterRing" lunit="mm" aunit="rad" startphi="0" deltaphi="2*pi" rmin1="1120.95" rmax1="1315" rmin2="1120.95" rmax2="1315" z="100+50"/><!--the information of the outer ring is taken from Moller-doc-793-v2-->
 
     <!--DS Hybrid shielding concrete-->