diff --git a/ahb_cmd_set_part_stage.py b/ahb_cmd_set_part_stage.py
index 8edf8f4..523d572 100644
--- a/ahb_cmd_set_part_stage.py
+++ b/ahb_cmd_set_part_stage.py
@@ -27,6 +27,7 @@ class AHB_SetPartStage:
                     obj.addProperty("App::PropertyInteger", "AssemblyHandbook_Stage", "AssemblyHandbook")
                 if not "AssemblyHandbook_RenderLines" in obj.PropertiesList:
                     obj.addProperty("App::PropertyBool", "AssemblyHandbook_RenderLines", "AssemblyHandbook")
+                    obj.AssemblyHandbook_RenderLines = True
                 if obj.AssemblyHandbook_Stage != stageId:
                     obj.AssemblyHandbook_Stage = stageId
                     workbench.context.onPartStageChanged(obj)