diff --git a/leenkx/blender/lnx/props_ui.py b/leenkx/blender/lnx/props_ui.py
index d9adb2a2..c34d9316 100644
--- a/leenkx/blender/lnx/props_ui.py
+++ b/leenkx/blender/lnx/props_ui.py
@@ -63,7 +63,7 @@ class LNX_PT_ObjectPropsPanel(bpy.types.Panel):
             return
 
         col = layout.column()
-        col.prop(mat, 'lnx_sorting_index')
+        col.prop(obj, 'lnx_sorting_index')
         col.prop(obj, 'lnx_export')
         if not obj.lnx_export:
             return