diff --git a/Packages/VRM10/Editor/Components/SpringBone/SpringBoneTreeView.cs b/Packages/VRM10/Editor/Components/SpringBone/SpringBoneTreeView.cs
index 36ad8e644..ee8bb9c55 100644
--- a/Packages/VRM10/Editor/Components/SpringBone/SpringBoneTreeView.cs
+++ b/Packages/VRM10/Editor/Components/SpringBone/SpringBoneTreeView.cs
@@ -5,6 +5,8 @@ using UnityEngine;
 using TreeView = UnityEditor.IMGUI.Controls.TreeView<int>;
 using TreeViewItem = UnityEditor.IMGUI.Controls.TreeViewItem<int>;
 using TreeViewState = UnityEditor.IMGUI.Controls.TreeViewState<int>;
+#else
+using UnityEditor.IMGUI.Controls;
 #endif
 
 namespace UniVRM10