diff --git a/Packages/UniGLTF/Editor/UniHumanoid/MuscleInspectorEditor.cs b/Packages/UniGLTF/Editor/UniHumanoid/MuscleInspectorEditor.cs
index dddc37da9..d17775906 100644
--- a/Packages/UniGLTF/Editor/UniHumanoid/MuscleInspectorEditor.cs
+++ b/Packages/UniGLTF/Editor/UniHumanoid/MuscleInspectorEditor.cs
@@ -4,7 +4,7 @@ using System.Collections.Generic;
 using UnityEditor;
 using UnityEditor.IMGUI.Controls;
 using UnityEngine;
-#if UNITY_6000_5_OR_NEWER
+#if UNITY_6000_2_OR_NEWER
 using TreeView = UnityEditor.IMGUI.Controls.TreeView<int>;
 using TreeViewItem = UnityEditor.IMGUI.Controls.TreeViewItem<int>;
 using TreeViewState = UnityEditor.IMGUI.Controls.TreeViewState<int>;
diff --git a/Packages/VRM10/Editor/Components/SpringBone/SpringBoneTreeView.cs b/Packages/VRM10/Editor/Components/SpringBone/SpringBoneTreeView.cs
index 0b1e44333..d46d01149 100644
--- a/Packages/VRM10/Editor/Components/SpringBone/SpringBoneTreeView.cs
+++ b/Packages/VRM10/Editor/Components/SpringBone/SpringBoneTreeView.cs
@@ -1,7 +1,7 @@
 using System.Collections.Generic;
 using UnityEditor;
 using UnityEngine;
-#if UNITY_6000_5_OR_NEWER
+#if UNITY_6000_2_OR_NEWER
 using TreeView = UnityEditor.IMGUI.Controls.TreeView<int>;
 using TreeViewItem = UnityEditor.IMGUI.Controls.TreeViewItem<int>;
 using TreeViewState = UnityEditor.IMGUI.Controls.TreeViewState<int>;