diff --git a/compact/definitions.xml b/compact/definitions.xml
index ed853680ef327f26f331a60057d6b13e235963c0..df5f8113072b810cb1179d34cc9c462869f8609e 100644
--- a/compact/definitions.xml
+++ b/compact/definitions.xml
@@ -327,7 +327,11 @@
     </comment>
     <constant name="cb_CTD_Si_rmin"   value="21.0 * cm"/>
     <constant name="cb_CTD_Si_rmax"   value="80.0 * cm"/>
+    <constant name="cb_CTD_Si_zmax"   value="200.0 * cm"/>
+    <comment> Original Global parameter </comment>	    
+    <!--
     <constant name="cb_CTD_Si_zmax"   value="120.0 * cm"/>
+    -->	    
     <constant name="cb_CTD_Si_length" value="SolenoidLength - cb_CTD_Si_zmax"/>
     <comment> After fix cb_Solenoid parameters  </comment>
     <!--