diff --git a/src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser/OpcUaClientBrowseSession.cs b/src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser/OpcUaClientBrowseSession.cs
index 9d6d5279..ef9dacaa 100644
--- a/src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser/OpcUaClientBrowseSession.cs
+++ b/src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser/OpcUaClientBrowseSession.cs
@@ -16,7 +16,7 @@ internal sealed class OpcUaClientBrowseSession : IBrowseSession
     private readonly NamespaceMap _nsMap;
     private readonly NodeId _rootNodeId;
     private readonly SemaphoreSlim _gate = new(1, 1);
-    private bool _disposed;
+    private volatile bool _disposed;
 
     /// <summary>
     ///     Construct a browse session bound to an already-connected <paramref name="session"/>.