diff --git a/src/System.Management.Automation/namespaces/IPermissionProvider.cs b/src/System.Management.Automation/namespaces/IPermissionProvider.cs
index 13b41261a19..c4f548e08a7 100644
--- a/src/System.Management.Automation/namespaces/IPermissionProvider.cs
+++ b/src/System.Management.Automation/namespaces/IPermissionProvider.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
 
+#nullable enable
 using System.Security.AccessControl;
 
 namespace System.Management.Automation.Provider