diff --git a/Haas_Lathes_BIDC/Bechtel ST-20Y.cps b/Haas_Lathes_BIDC/Bechtel ST-20Y.cps
index 8392f26..780f5af 100644
--- a/Haas_Lathes_BIDC/Bechtel ST-20Y.cps	
+++ b/Haas_Lathes_BIDC/Bechtel ST-20Y.cps	
@@ -694,7 +694,7 @@ function getCompleteTool(holder, tool) {
     };
 
     this.offsetType = (haasType == HAAS_END_MILL) ? "Mill Probe" : "Drill Probe";
-    this.probeZ = (haasType == HAAS_END_MILL) ? millX : drillX;
+    this.probeX = (haasType == HAAS_END_MILL) ? millX : drillX;
     this.machineX = function() {
       return holder.x;
     }