diff --git a/src/sliceDataStorage.cpp b/src/sliceDataStorage.cpp
index fbd4a5d1a9..2d45da94f2 100644
--- a/src/sliceDataStorage.cpp
+++ b/src/sliceDataStorage.cpp
@@ -560,9 +560,14 @@ Polygons SliceDataStorage::getMachineBorder(int checking_extruder_nr) const
 
     Polygons disallowed_areas = mesh_group_settings.get<Polygons>("machine_disallowed_areas");
     disallowed_areas = disallowed_areas.unionPolygons(); // union overlapping disallowed areas
-    for (PolygonRef poly : disallowed_areas)
-        for (Point& p : poly)
-            p = Point(machine_size.max.x / 2 + p.X, machine_size.max.y / 2 - p.Y); // apparently the frontend stores the disallowed areas in a different coordinate system
+
+    // The disallowed areas are always expressed in buildplate-centered coordinates
+    if (! mesh_group_settings.get<bool>("machine_center_is_zero"))
+    {
+        for (PolygonRef poly : disallowed_areas)
+            for (Point& p : poly)
+                p = Point(machine_size.max.x / 2 + p.X, machine_size.max.y / 2 - p.Y);
+    }
 
     std::vector<bool> extruder_is_used = getExtrudersUsed();