diff --git a/GameRes/GameRes.cs b/GameRes/GameRes.cs
index c5bd4335..1c2f40c3 100644
--- a/GameRes/GameRes.cs
+++ b/GameRes/GameRes.cs
@@ -103,6 +103,8 @@ namespace GameRes
     {
         public override string Type { get { return "archive"; } }
 
+        public virtual bool CanCreate { get { return false; } }
+
         public abstract bool IsHierarchic { get; }
 
         public abstract ArcFile TryOpen (ArcView view);