diff --git a/compact/gem_tracker_endcap.xml b/compact/gem_tracker_endcap.xml
index cde830bce8179305a3393046c289ccae7eb5cdcc..224e20ae4ba653cfe1b240c9a41eb22e7030d599 100644
--- a/compact/gem_tracker_endcap.xml
+++ b/compact/gem_tracker_endcap.xml
@@ -10,7 +10,7 @@
 
     <constant name="GEMTrackerEndcapLayer_thickness"  value="ForwardTrackingGEMLength/GEMTrackerEndcap_NLayers"/>
     <constant name="GEMTrackerEndcapFoil_rmin"        value="GEMTrackerEndcapFoilX1/(tan(GEMTrackerEndcapFoilOpeningAngle/2.0)*2.0)"/>
-    <constant name="GEMTrackerEndcapFoilY"            value="BarrelTrackingAndPID_rmax- GEMTrackerEndcapFoil_rmin- 1.0*cm"/>
+    <constant name="GEMTrackerEndcapFoilY"            value="BarrelTracking_rmax- GEMTrackerEndcapFoil_rmin- 1.0*cm"/>
     <constant name="GEMTrackerEndcapFoilX2"           value="2*GEMTrackerEndcapFoilY*tan(GEMTrackerEndcapFoilOpeningAngle/2.0) +  GEMTrackerEndcapFoilX1"/>
     <constant name="GEMTrackerEndcapFoil_rmax"        value="(GEMTrackerEndcapFoilY+GEMTrackerEndcapFoil_rmin)/(cos(GEMTrackerEndcapFoilOpeningAngle/2.0))"/>