diff --git a/src/libraries/System.Net.Quic/src/Interop/MsQuicNativeMethods.cs b/src/libraries/System.Net.Quic/src/Interop/MsQuicNativeMethods.cs
index 136051c228fd9..aca6b41a58006 100644
--- a/src/libraries/System.Net.Quic/src/Interop/MsQuicNativeMethods.cs
+++ b/src/libraries/System.Net.Quic/src/Interop/MsQuicNativeMethods.cs
@@ -304,15 +304,15 @@ internal struct StreamEventDataRecv
             internal ulong TotalBufferLength;
             internal QuicBuffer* Buffers;
             internal uint BufferCount;
-            internal byte Flags;
+            internal uint Flags;
         }
 
         [StructLayout(LayoutKind.Explicit)]
         internal struct StreamEventDataSendComplete
         {
-            [FieldOffset(7)]
+            [FieldOffset(0)]
             internal byte Canceled;
-            [FieldOffset(8)]
+            [FieldOffset(1)]
             internal IntPtr ClientContext;
 
             internal bool IsCanceled()
@@ -336,7 +336,7 @@ internal struct StreamEventDataPeerRecvAbort
         [StructLayout(LayoutKind.Sequential)]
         internal struct StreamEventDataSendShutdownComplete
         {
-            internal bool Graceful;
+            internal byte Graceful;
         }
 
         [StructLayout(LayoutKind.Explicit)]
diff --git a/src/libraries/System.Net.Quic/src/System/Net/Quic/Implementations/MsQuic/MsQuicStream.cs b/src/libraries/System.Net.Quic/src/System/Net/Quic/Implementations/MsQuic/MsQuicStream.cs
index 02a57c8790476..536968b55cdfd 100644
--- a/src/libraries/System.Net.Quic/src/System/Net/Quic/Implementations/MsQuic/MsQuicStream.cs
+++ b/src/libraries/System.Net.Quic/src/System/Net/Quic/Implementations/MsQuic/MsQuicStream.cs
@@ -101,6 +101,8 @@ internal override long StreamId
         {
             get
             {
+                ThrowIfDisposed();
+
                 if (_streamId == -1)
                 {
                     _streamId = GetStreamId();
@@ -390,6 +392,8 @@ internal override ValueTask ShutdownWriteCompleted(CancellationToken cancellatio
 
         internal override void Shutdown()
         {
+            ThrowIfDisposed();
+
             MsQuicApi.Api.StreamShutdownDelegate(_ptr, (uint)QUIC_STREAM_SHUTDOWN_FLAG.GRACEFUL, errorCode: 0);
         }
 
diff --git a/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicStreamTests.cs b/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicStreamTests.cs
index 2884f5e0a66ed..1a6531371190f 100644
--- a/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicStreamTests.cs
+++ b/src/libraries/System.Net.Quic/tests/FunctionalTests/QuicStreamTests.cs
@@ -67,11 +67,10 @@ from writeSize in sizes
                 select new object[] { readSize, writeSize };
         }
 
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/32049")]
         [Fact]
         public async Task Read_StreamAborted_Throws()
         {
-            const int ExpectedErrorCode = 1234;
+            const int ExpectedErrorCode = 0xfffffff;
 
             await Task.Run(async () =>
             {