diff --git a/Haas_Lathes_BIDC/haas st-20.cps b/Haas_Lathes_BIDC/haas st-20.cps
index 3245b92..d017612 100644
--- a/Haas_Lathes_BIDC/haas st-20.cps	
+++ b/Haas_Lathes_BIDC/haas st-20.cps	
@@ -598,7 +598,7 @@ function getCompleteTool(holder, tool) {
       case TOOL_TURNING_THREADING:
         this.offsetType = "Threading";
         this.x = function() {
-          return holder.x + (tool.cuttingWidth - tool.shankWidth*.5);
+          return holder.x - (tool.cuttingWidth - tool.shankWidth*.5);
         };
         this.z = function() {
           return holder.z + (tool.holderOverallLength + holder.sOffset);