diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.uGUI.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.uGUI.cs
index 2d91a8f..7f1a90c 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.uGUI.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.uGUI.cs
@@ -793,7 +793,7 @@ namespace Cysharp.Threading.Tasks
                     }
                     if (cancellationToken2.CanBeCanceled)
                     {
-                        registration2 = cancellationToken1.RegisterWithoutCaptureExecutionContext(cancel2, this);
+                        registration2 = cancellationToken2.RegisterWithoutCaptureExecutionContext(cancel2, this);
                     }
                 }