diff --git a/ScriptCore/Editor/EntityEditor.cs b/ScriptCore/Editor/EntityEditor.cs
index b1c64bc..dc7b0e7 100644
--- a/ScriptCore/Editor/EntityEditor.cs
+++ b/ScriptCore/Editor/EntityEditor.cs
@@ -642,7 +642,7 @@ internal class EntityEditor
                 newIndex = list.Count;
 
                 Array newArray = Array.CreateInstance(elementType, list.Count + 1);
-                Array.Copy((Array)list, newArray, newArray.Length);
+                Array.Copy((Array)list, newArray, list.Count);
 
                 newList = newArray;
             }