diff --git a/src/Desktop/BiliCopilot.UI/Controls/Danmaku/VideoDanmakuPanel.xaml.cs b/src/Desktop/BiliCopilot.UI/Controls/Danmaku/VideoDanmakuPanel.xaml.cs
index 45f131aa..a0ce7118 100644
--- a/src/Desktop/BiliCopilot.UI/Controls/Danmaku/VideoDanmakuPanel.xaml.cs
+++ b/src/Desktop/BiliCopilot.UI/Controls/Danmaku/VideoDanmakuPanel.xaml.cs
@@ -180,7 +180,7 @@ private void ResetDanmakuStyle()
     private void ResetSpeed()
     {
         var finalSpeed = ViewModel.DanmakuSpeed * 5 * ViewModel.ExtraSpeed;
-        _danmakuController.SetRollingSpeed(finalSpeed);
+        _danmakuController?.SetRollingSpeed(finalSpeed);
     }
 
     private void Redraw(bool force = false)