diff --git a/ProjectObsidian/ProtoFlux/Users/UserFromUserRef.cs b/ProjectObsidian/ProtoFlux/Users/UserFromUserRef.cs
index 616b4f8..3e3c733 100644
--- a/ProjectObsidian/ProtoFlux/Users/UserFromUserRef.cs
+++ b/ProjectObsidian/ProtoFlux/Users/UserFromUserRef.cs
@@ -14,6 +14,10 @@ public class UserFromUserRef : ObjectFunctionNode<FrooxEngineContext, User>
 
         protected override User Compute(FrooxEngineContext context)
         {
+            if (UserRef.Evaluate(context) == null)
+            {
+                return null;
+            }
             UserRef userRef = UserRef.Evaluate(context);
             return userRef.Target;
         }