diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index f67c53e8..c72e6282 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -176,7 +176,7 @@
     <Compile Include="Silky\ArcARC.cs" />
     <Compile Include="Silky\ArcIFL.cs" />
     <Compile Include="ArcIKS.cs" />
-    <Compile Include="ArcInnGrey.cs" />
+    <Compile Include="ArcPACKDAT.cs" />
     <Compile Include="CatSystem\ArcINT.cs" />
     <Compile Include="ArcISA.cs" />
     <Compile Include="Kaas\ArcKAAS.cs" />
diff --git a/ArcFormats/ArcInnGrey.cs b/ArcFormats/ArcPACKDAT.cs
similarity index 100%
rename from ArcFormats/ArcInnGrey.cs
rename to ArcFormats/ArcPACKDAT.cs