diff --git a/start_end.cfg b/start_end.cfg
index 49f431d..8031702 100644
--- a/start_end.cfg
+++ b/start_end.cfg
@@ -445,8 +445,8 @@ gcode:
     {% set points = [MODEL_MIN, MODEL_MAX] %}
   {% endif %}
   {% if (printer.exclude_object|default({})).objects %}
-    {% set points = printer.exclude_object.objects|map(attribute='polygon')|
-                      sum(start=points) %}
+    {% set points = printer.exclude_object.objects|selectattr('polygon')|
+                      map(attribute='polygon')|sum(start=points) %}
     {% set points_len = points|length %}
     {% if points_len >= 2 %}
       {% set x_coords = (points|map(attribute=0)|sort|list)[0::points_len-1] %}