diff --git a/src/libraries/System.Windows.Extensions/src/System/Media/SoundPlayer.cs b/src/libraries/System.Windows.Extensions/src/System/Media/SoundPlayer.cs
index f84f503682efcf..4ded3f0d2bf963 100644
--- a/src/libraries/System.Windows.Extensions/src/System/Media/SoundPlayer.cs
+++ b/src/libraries/System.Windows.Extensions/src/System/Media/SoundPlayer.cs
@@ -308,8 +308,7 @@ private void LoadSync()
 
         private void LoadStream(bool loadSync)
         {
-            Debug.Assert(_stream != null);
-            if (loadSync && _stream.CanSeek)
+            if (loadSync && _stream!.CanSeek)
             {
                 int streamLen = (int)_stream.Length;
                 _currentPos = 0;