diff --git a/leenkx/blender/lnx/exporter.py b/leenkx/blender/lnx/exporter.py
index 2351fb5..de444d2 100644
--- a/leenkx/blender/lnx/exporter.py
+++ b/leenkx/blender/lnx/exporter.py
@@ -636,7 +636,10 @@ class LeenkxExporter:
                 continue
 
             for slot in bobject.material_slots:
-                if slot.material is None or slot.material.library is not None:
+                if slot.material is None:
+                    continue
+                if slot.material.library is not None:
+                    slot.material.lnx_particle_flag = True
                     continue
                 if slot.material.name.endswith(variant_suffix):
                     continue