diff --git a/src/System.Management.Automation/namespaces/IPropertiesProvider.cs b/src/System.Management.Automation/namespaces/IPropertiesProvider.cs
index 555037635ef..1f4a6c168fe 100644
--- a/src/System.Management.Automation/namespaces/IPropertiesProvider.cs
+++ b/src/System.Management.Automation/namespaces/IPropertiesProvider.cs
@@ -3,6 +3,7 @@
 
 using System.Collections.ObjectModel;
 
+#nullable enable
 namespace System.Management.Automation.Provider
 {
     #region IPropertyCmdletProvider
@@ -58,7 +59,7 @@ public interface IPropertyCmdletProvider
         /// </remarks>
         void GetProperty(
             string path,
-            Collection<string> providerSpecificPickList);
+            Collection<string>? providerSpecificPickList);
 
         /// <summary>
         /// Gives the provider an opportunity to attach additional parameters to the
@@ -79,9 +80,9 @@ void GetProperty(
         ///
         /// The default implementation returns null. (no additional parameters)
         /// </returns>
-        object GetPropertyDynamicParameters(
+        object? GetPropertyDynamicParameters(
             string path,
-            Collection<string> providerSpecificPickList);
+            Collection<string>? providerSpecificPickList);
 
         /// <summary>
         /// Sets the specified properties of the item at the specified path.
@@ -137,7 +138,7 @@ void SetProperty(
         ///
         /// The default implementation returns null. (no additional parameters)
         /// </returns>
-        object SetPropertyDynamicParameters(
+        object? SetPropertyDynamicParameters(
             string path,
             PSObject propertyValue);
 
@@ -191,7 +192,7 @@ void ClearProperty(
         ///
         /// The default implementation returns null. (no additional parameters)
         /// </returns>
-        object ClearPropertyDynamicParameters(
+        object? ClearPropertyDynamicParameters(
             string path,
             Collection<string> propertyToClear);
     }