diff --git a/Assets/VRM/Runtime/LookAt/CurveMapper.cs b/Assets/VRM/Runtime/LookAt/CurveMapper.cs
index c18d2c3bb..b5d0a8f3f 100644
--- a/Assets/VRM/Runtime/LookAt/CurveMapper.cs
+++ b/Assets/VRM/Runtime/LookAt/CurveMapper.cs
@@ -17,12 +17,6 @@ namespace VRM
         [Range(0, 90.0f)]
         public float CurveYRangeDegree;
 
-        /*
-        public CurveMapper() : this(90.0f, 10.0f)
-        {
-        }
-        */
-
         public CurveMapper(float xRange, float yRange)
         {
             CurveXRangeDegree = xRange;
@@ -93,5 +87,10 @@ namespace VRM
             }
             return base.Equals(obj);
         }
+
+        public override int GetHashCode()
+        {
+            return base.GetHashCode();
+        }
     }
 }