diff --git a/src/Snap.Hutao/Snap.Hutao/Core/Threading/SpinWaitPolyfill.cs b/src/Snap.Hutao/Snap.Hutao/Core/Threading/SpinWaitPolyfill.cs
index 989ce35d..175da40f 100644
--- a/src/Snap.Hutao/Snap.Hutao/Core/Threading/SpinWaitPolyfill.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Core/Threading/SpinWaitPolyfill.cs
@@ -5,8 +5,6 @@ using System.Diagnostics;
 
 namespace Snap.Hutao.Core.Threading;
 
-internal delegate bool SpinWaitPredicate<T>(ref readonly T state);
-
 internal static class SpinWaitPolyfill
 {
     public static unsafe void SpinUntil<T>(ref T state, delegate*<ref readonly T, bool> condition)