diff --git a/calc-config.json b/calc-config.json
index c1608dc1c61165ae96ee9438560cffada9fed709..4287838dac4f68f2866ffb802983137837efa0ad 100644
--- a/calc-config.json
+++ b/calc-config.json
@@ -1,5 +1,6 @@
 {
   "performance": {
-    "distanceFilterUpdate": false
+    "distanceFilterUpdate": false,
+    "gridFocalMechUpdate": false
   }
 }