diff --git a/src/napatrackmater/clustering.py b/src/napatrackmater/clustering.py
index 905bb552..3be24c74 100644
--- a/src/napatrackmater/clustering.py
+++ b/src/napatrackmater/clustering.py
@@ -383,7 +383,7 @@ def get_label_centroid_cloud(binary_image, num_points, ndim, label, centroid, mi
             vertices = None
         if vertices is not None:
             mesh_obj = trimesh.Trimesh(vertices=vertices, faces=faces)
-            simple_clouds = mesh_obj.sample(num_points).data
+            simple_clouds = np.asarray(mesh_obj.sample(num_points).data)
             
             if compute_with_autoencoder:
                 mesh_obj = trimesh.Trimesh(vertices=vertices, faces=faces, process=False)