diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index fe6a84c6..6a3ee6e7 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -588,7 +588,7 @@
     <Compile Include="TechnoBrain\ImageIPF.cs" />
     <Compile Include="TechnoBrain\ImageIPH.cs" />
     <Compile Include="DxLib\ArcDX.cs" />
-    <Compile Include="ArcMiris.cs" />
+    <Compile Include="Eternity\ArcMiris.cs" />
     <Compile Include="Bishop\ArcBSA.cs" />
     <Compile Include="Bishop\ArcBSC.cs" />
     <Compile Include="Bishop\ImageBSG.cs" />
diff --git a/ArcFormats/ArcMiris.cs b/ArcFormats/Eternity/ArcMiris.cs
similarity index 99%
rename from ArcFormats/ArcMiris.cs
rename to ArcFormats/Eternity/ArcMiris.cs
index 58380bc0..8d767056 100644
--- a/ArcFormats/ArcMiris.cs
+++ b/ArcFormats/Eternity/ArcMiris.cs
@@ -97,7 +97,7 @@ namespace GameRes.Formats.Miris
 
         public GlnkOpener ()
         {
-            Extensions = new string[] { "dat", "glk", "mlk", "slk", "gl", "ml", "sl" };
+            Extensions = new string[] { "dat", "glk", "mlk", "slk", "gl", "ml", "sl", "ets", "etg", "etm" };
         }
 
         public override ArcFile TryOpen (ArcView file)