diff --git a/src/System.Management.Automation/engine/remoting/server/ServerRunspacePoolDriver.cs b/src/System.Management.Automation/engine/remoting/server/ServerRunspacePoolDriver.cs
index bf235088a41..c5337807bb2 100644
--- a/src/System.Management.Automation/engine/remoting/server/ServerRunspacePoolDriver.cs
+++ b/src/System.Management.Automation/engine/remoting/server/ServerRunspacePoolDriver.cs
@@ -28,12 +28,14 @@ namespace System.Management.Automation
     /// Interface exposing driver single thread invoke enter/exit
     /// nested pipeline.
     /// </summary>
+#nullable enable
     internal interface IRSPDriverInvoke
     {
         void EnterNestedPipeline();
         void ExitNestedPipeline();
         bool HandleStopSignal();
     }
+#nullable restore
 
     /// <summary>
     /// This class wraps a RunspacePoolInternal object. It is used to function