diff --git a/Assets/VRM/Editor/BlendShape/VRMBlendShapeProxyValidator.cs b/Assets/VRM/Editor/BlendShape/VRMBlendShapeProxyValidator.cs
index 3c1ae1d90..84cb3a2f1 100644
--- a/Assets/VRM/Editor/BlendShape/VRMBlendShapeProxyValidator.cs
+++ b/Assets/VRM/Editor/BlendShape/VRMBlendShapeProxyValidator.cs
@@ -24,6 +24,10 @@ namespace VRM
             var used = new HashSet<BlendShapeKey>();
             foreach (var c in p.BlendShapeAvatar.Clips)
             {
+                if (c == null)
+                {
+                    continue;
+                }
                 var key = c.Key;
                 if (used.Contains(key))
                 {
diff --git a/Assets/VRM/Runtime/IO/VRMExporter.cs b/Assets/VRM/Runtime/IO/VRMExporter.cs
index 77219d00b..1b5c06422 100644
--- a/Assets/VRM/Runtime/IO/VRMExporter.cs
+++ b/Assets/VRM/Runtime/IO/VRMExporter.cs
@@ -97,6 +97,10 @@ namespace VRM
                 {
                     foreach (var x in avatar.Clips)
                     {
+                        if (x == null)
+                        {
+                            continue;
+                        }
                         VRM.blendShapeMaster.Add(x, this);
                     }
                 }