diff --git a/AMNet.Server/DllMain.cs b/AMNet.Server/DllMain.cs
index 54ae69d..e951608 100644
--- a/AMNet.Server/DllMain.cs
+++ b/AMNet.Server/DllMain.cs
@@ -91,7 +91,7 @@ public static class DllMain
     }
 
     [UnmanagedCallersOnly(EntryPoint = "aime_io_nfc_get_aime_id")]
-    public static int GetAimeId(byte unitNo, nint luid, nint luidSize)
+    public static int GetAimeId(byte unitNo, IntPtr luid, nint luidSize)
     {
         if (unitNo != 0)
         {