diff --git a/src/LitMotion/Assets/LitMotion/Runtime/External/UniRx/LitMotionUniRxExtensions.cs b/src/LitMotion/Assets/LitMotion/Runtime/External/UniRx/LitMotionUniRxExtensions.cs
index 3d926d9a..da9c12ce 100644
--- a/src/LitMotion/Assets/LitMotion/Runtime/External/UniRx/LitMotionUniRxExtensions.cs
+++ b/src/LitMotion/Assets/LitMotion/Runtime/External/UniRx/LitMotionUniRxExtensions.cs
@@ -26,6 +26,7 @@ public static IObservable<TValue> ToObservable<TValue, TOptions, TAdapter>(this
             var callbacks = builder.BuildCallbackData(subject, (x, subject) => subject.OnNext(x));
             callbacks.OnCompleteAction = builder.buffer.OnComplete;
             callbacks.OnCompleteAction += () => subject.OnCompleted();
+            callbacks.OnCancelAction += () => subject.OnCompleted();
             var scheduler = builder.buffer.Scheduler;
             var entity = builder.BuildMotionData();