diff --git a/Assets/VRM10/Runtime/IO/Vrm10Exporter.cs b/Assets/VRM10/Runtime/IO/Vrm10Exporter.cs
index b4dc9903a..6b94a4926 100644
--- a/Assets/VRM10/Runtime/IO/Vrm10Exporter.cs
+++ b/Assets/VRM10/Runtime/IO/Vrm10Exporter.cs
@@ -321,6 +321,7 @@ namespace UniVRM10
                     // node
                     var node = converter.Nodes[y.gameObject];
                     var nodeIndex = model.Nodes.IndexOf(node);
+                    colliders.Add(nodeIndex);
                     var gltfNode = Storage.Gltf.nodes[nodeIndex];
 
                     // VRMC_node_collider