diff --git a/ArcFormats/Favorite/ArcHZC.cs b/ArcFormats/Favorite/ArcHZC.cs
index 9f79a2dd..1bdd25de 100644
--- a/ArcFormats/Favorite/ArcHZC.cs
+++ b/ArcFormats/Favorite/ArcHZC.cs
@@ -52,6 +52,11 @@ namespace GameRes.Formats.FVP
         public override bool  IsHierarchic { get { return false; } }
         public override bool     CanCreate { get { return false; } }
 
+        public HzcOpener ()
+        {
+            Extensions = new string[] { "hzc" };
+        }
+
         static readonly Lazy<ImageFormat> Hzc = new Lazy<ImageFormat> (() => ImageFormat.FindByTag ("HZC"));
 
         public override ArcFile TryOpen (ArcView file)
diff --git a/ArcFormats/Kaguya/ArcLINK.cs b/ArcFormats/Kaguya/ArcLINK.cs
index feeb7eb9..aaae31a3 100644
--- a/ArcFormats/Kaguya/ArcLINK.cs
+++ b/ArcFormats/Kaguya/ArcLINK.cs
@@ -31,7 +31,7 @@ using System.IO;
 namespace GameRes.Formats.Kaguya
 {
     [Export(typeof(ArchiveFormat))]
-    public class PakOpener : ArchiveFormat
+    public class LinkOpener : ArchiveFormat
     {
         public override string         Tag { get { return "LINK/KAGUYA"; } }
         public override string Description { get { return "KaGuYa script engine resource archive"; } }
@@ -39,6 +39,11 @@ namespace GameRes.Formats.Kaguya
         public override bool  IsHierarchic { get { return false; } }
         public override bool     CanCreate { get { return false; } }
 
+        public LinkOpener ()
+        {
+            Extensions = new string[] { "arc" };
+        }
+
         public override ArcFile TryOpen (ArcView file)
         {
             int version = file.View.ReadByte (4) - '0';