diff --git a/IPA.Loader/Config/IniFile.cs b/IPA.Loader/Config/IniFile.cs
index 3ba9300b..7a808728 100644
--- a/IPA.Loader/Config/IniFile.cs
+++ b/IPA.Loader/Config/IniFile.cs
@@ -1,4 +1,5 @@
-using System.IO;
+using System;
+using System.IO;
 using System.Runtime.InteropServices;
 using System.Text;
 
@@ -7,6 +8,7 @@ namespace IPA.Config
     /// <summary>
     /// Create a New INI file to store or load data
     /// </summary>
+    [Obsolete("Jesus, this uses old 16-bit system calls!")]
     internal class IniFile
     {
         [DllImport("KERNEL32.DLL", EntryPoint = "GetPrivateProfileStringW",
diff --git a/IPA.Loader/Config/ModPrefs.cs b/IPA.Loader/Config/ModPrefs.cs
index e63002f7..151162f0 100644
--- a/IPA.Loader/Config/ModPrefs.cs
+++ b/IPA.Loader/Config/ModPrefs.cs
@@ -8,6 +8,7 @@ namespace IPA.Config
     /// <summary>
     /// Allows to get and set preferences for your mod. 
     /// </summary>
+    [Obsolete("This uses IniFile")]
     public interface IModPrefs
     {
         /// <summary>
@@ -87,6 +88,7 @@ namespace IPA.Config
     /// <summary>
     /// Allows to get and set preferences for your mod. 
     /// </summary>
+    [Obsolete("This uses IniFile, which is dumb")]
     public class ModPrefs : IModPrefs
     {
         private static ModPrefs _staticInstance;