diff --git a/Marlin/ubl_G29.cpp b/Marlin/ubl_G29.cpp
index c401fa6962..a8f365a2e7 100644
--- a/Marlin/ubl_G29.cpp
+++ b/Marlin/ubl_G29.cpp
@@ -1287,8 +1287,8 @@
     out_mesh.distance = -99999.9f;
 
     // Get our reference position. Either the nozzle or probe location.
-    const float px = rx - (probe_as_reference == USE_PROBE_AS_REFERENCE ? X_PROBE_OFFSET_FROM_EXTRUDER : 0),
-                py = ry - (probe_as_reference == USE_PROBE_AS_REFERENCE ? Y_PROBE_OFFSET_FROM_EXTRUDER : 0);
+    const float px = rx + (probe_as_reference == USE_PROBE_AS_REFERENCE ? X_PROBE_OFFSET_FROM_EXTRUDER : 0),
+                py = ry + (probe_as_reference == USE_PROBE_AS_REFERENCE ? Y_PROBE_OFFSET_FROM_EXTRUDER : 0);
 
     float best_so_far = 99999.99f;