diff --git a/Assets/VRM/UniGLTF/Editor/Serialization/SerializerGenerator.cs b/Assets/VRM/UniGLTF/Editor/Serialization/SerializerGenerator.cs
index fbde88225..31ac7183c 100644
--- a/Assets/VRM/UniGLTF/Editor/Serialization/SerializerGenerator.cs
+++ b/Assets/VRM/UniGLTF/Editor/Serialization/SerializerGenerator.cs
@@ -71,6 +71,7 @@ namespace UniGLTF
                 {"gltf/nodes[]/camera", "if(value.camera!=-1)"},
                 {"gltf/nodes[]/mesh", "if(value.mesh!=-1)"},
                 {"gltf/nodes[]/skin", "if(value.skin!=-1)"},
+                {"gltf/nodes[]/children", "if(value.children.Length>0)"},
                 {"gltf/skins[]/skeleton", "if(value.skeleton!=-1)"},
                 {"gltf/extensionsRequired", "if(false)"},
                 {"gltf/extensions/VRM/humanoid/humanBones[]/axisLength", "if(value.axisLength>0)"},
diff --git a/Assets/VRM/UniGLTF/Scripts/IO/FormatterExtensionsGltf.g.cs b/Assets/VRM/UniGLTF/Scripts/IO/FormatterExtensionsGltf.g.cs
index bec719f4c..0bea93899 100644
--- a/Assets/VRM/UniGLTF/Scripts/IO/FormatterExtensionsGltf.g.cs
+++ b/Assets/VRM/UniGLTF/Scripts/IO/FormatterExtensionsGltf.g.cs
@@ -957,7 +957,7 @@ namespace UniGLTF {
             f.Key("name"); f.GenSerialize(value.name);
         }
 
-        if(value.children!=null)
+        if(value.children.Length>0)
         {
             f.Key("children"); f.GenSerialize(value.children);
         }