diff --git a/plugins/PostProcessingPlugin/scripts/DisplayFilenameAndLayerOnLCD.py b/plugins/PostProcessingPlugin/scripts/DisplayFilenameAndLayerOnLCD.py
index bc64463d9b..70e23b8c2f 100644
--- a/plugins/PostProcessingPlugin/scripts/DisplayFilenameAndLayerOnLCD.py
+++ b/plugins/PostProcessingPlugin/scripts/DisplayFilenameAndLayerOnLCD.py
@@ -49,6 +49,7 @@ class DisplayFilenameAndLayerOnLCD(Script):
         }"""
     
     def execute(self, data):
+        max_layer = 0
         if self.getSettingValueByKey("name") != "":
             name = self.getSettingValueByKey("name")
         else: