diff --git a/compact/definitions.xml b/compact/definitions.xml
index 1bee6a7d3390ee292adea082eba75ce97973e3d1..39e99eac17f02c677cd1d3d35962054d8d270e6f 100644
--- a/compact/definitions.xml
+++ b/compact/definitions.xml
@@ -656,7 +656,7 @@
 
     <comment> Global parameters </comment>
     <constant name="ffi_ZDC_width"             value="60.0 * cm"/>
-    <constant name="ffi_ZDC_thickness"         value="11.0 * cm"/><comment> Changed from 200.0 cm </comment>
+    <constant name="ffi_ZDC_thickness"         value="10.0 * cm"/><comment> Changed from 200.0 cm </comment>
     <comment> Original Global parameters </comment>     
     <!--
     <constant name="ffi_ZDC_thickness"         value="250.0 * cm"/>
@@ -666,7 +666,7 @@
     <constant name="ffi_ZDC_ECAL_outer_radius" value="60.0 * cm"/>
     <constant name="ffi_ZDC_ECAL_width"        value="5.0 * cm"/>
     <constant name="ffi_ZDC_ECAL_gap"          value="5.0 * mm"/>
-    <constant name="ffi_ZDC_ECAL_ntower"       value="11"/>
+    <constant name="ffi_ZDC_ECAL_ntower"       value="12"/>
     <comment> Original number of towers parameter  </comment> 
     <!--
     <constant name="ffi_ZDC_ECAL_ntower"       value="20"/>
diff --git a/src/ffi_ZDC.cpp b/src/ffi_ZDC.cpp
index 5d0b39beb00290e0deb59531b22bc41fd15c2bb4..43c31e31fd77a2cc44f9e635b90215c736a75ab3 100644
--- a/src/ffi_ZDC.cpp
+++ b/src/ffi_ZDC.cpp
@@ -18,7 +18,7 @@ static Ref_t createDetector(Detector& desc, xml_h e, SensitiveDetector sens)
   int        detID      = x_det.id();
 
   xml_dim_t  dim        = x_det.dimensions();
-  double     Width      = dim.x() + 5.0 * cm;
+  double     Width      = dim.x();
   double     Thickness  = dim.z();
   
   xml_dim_t  pos        = x_det.position();