diff --git a/meta-opencentauri/recipes-apps/klipper/files/macros.cfg b/meta-opencentauri/recipes-apps/klipper/files/macros.cfg
index 906cbd96..b0cb77b9 100644
--- a/meta-opencentauri/recipes-apps/klipper/files/macros.cfg
+++ b/meta-opencentauri/recipes-apps/klipper/files/macros.cfg
@@ -922,6 +922,7 @@ gcode:
 
 [gcode_macro PURGE]
 gcode:
+    {% set global = printer['gcode_macro _global_var'] %}
     {% set purge_length = params.PURGE_LENGTH|default(200, true)|float %}
 
     {% if printer.extruder.target < 180 or not printer.extruder.can_extrude %}