diff --git a/Assets/VRCAvatarEditor/Editor/DataClass/VRCAvatarBase.cs b/Assets/VRCAvatarEditor/Editor/DataClass/VRCAvatarBase.cs
index 5817419..eafaaae 100644
--- a/Assets/VRCAvatarEditor/Editor/DataClass/VRCAvatarBase.cs
+++ b/Assets/VRCAvatarEditor/Editor/DataClass/VRCAvatarBase.cs
@@ -141,8 +141,7 @@ private float CalculateAvatarHeight(Vector3 footPosition,
 
         private float CalculateMaxPositionInMesh(Transform meshTransform, Mesh mesh)
         {
-            if (mesh is null) return float.MinValue;
-            return mesh.vertices.Select(v => meshTransform.TransformPoint(v).y).Max();
+            return mesh.vertices.Select(v => meshTransform.TransformPoint(v).y).DefaultIfEmpty().Max();
         }
     }
 }