diff --git a/SabreTools.Serialization/Models/MoPaQ/Constants.cs b/SabreTools.Serialization/Models/MoPaQ/Constants.cs
index 0192e812..02fecae5 100644
--- a/SabreTools.Serialization/Models/MoPaQ/Constants.cs
+++ b/SabreTools.Serialization/Models/MoPaQ/Constants.cs
@@ -79,5 +79,29 @@ namespace SabreTools.Data.Models.MoPaQ
         public const uint MPQ_KEY_HASH_TABLE = 0xC3AF3770;
 
         #endregion
+
+        #region Special Entry Names
+
+        /// <summary>
+        /// Name of internal listfile
+        /// </summary>
+        public const string LISTFILE_NAME = "(listfile)";
+
+        /// <summary>
+        /// Name of internal signature
+        /// </summary>
+        public const string SIGNATURE_NAME = "(signature)";
+
+        /// <summary>
+        /// Name of internal attributes file
+        /// </summary>
+        public const string ATTRIBUTES_NAME = "(attributes)";
+
+        /// <summary>
+        /// Patch metadata
+        /// </summary>
+        public const string PATCH_METADATA_NAME = "(patch_metadata)";
+
+        #endregion
     }
 }
diff --git a/SabreTools.Serialization/Wrappers/MoPaQ.Extraction.cs b/SabreTools.Serialization/Wrappers/MoPaQ.Extraction.cs
index 2f47019b..6b391126 100644
--- a/SabreTools.Serialization/Wrappers/MoPaQ.Extraction.cs
+++ b/SabreTools.Serialization/Wrappers/MoPaQ.Extraction.cs
@@ -1,6 +1,7 @@
 using System;
 using System.IO;
 using StormLibSharp;
+using static SabreTools.Data.Models.MoPaQ.Constants;
 
 namespace SabreTools.Serialization.Wrappers
 {
@@ -24,7 +25,7 @@ namespace SabreTools.Serialization.Wrappers
                 // Try to open the archive and listfile
                 var mpqArchive = new MpqArchive(Filename, FileAccess.Read);
                 string? listfile = null;
-                MpqFileStream listStream = mpqArchive.OpenFile("(listfile)");
+                MpqFileStream listStream = mpqArchive.OpenFile(LISTFILE_NAME);
 
                 // If we can't read the listfile, we just return
                 if (!listStream.CanRead)