diff --git a/src/System.Management.Automation/engine/InitialSessionState.cs b/src/System.Management.Automation/engine/InitialSessionState.cs
index 701d9f0a856..8c4cc0d0e21 100644
--- a/src/System.Management.Automation/engine/InitialSessionState.cs
+++ b/src/System.Management.Automation/engine/InitialSessionState.cs
@@ -1842,10 +1842,13 @@ public Microsoft.PowerShell.ExecutionPolicy ExecutionPolicy
         /// </summary>
         /// <param name="name">The modules to add</param>
         /// <returns></returns>
-        public void ImportPSModule(string[] name)
+        public void ImportPSModule(params string[] name)
         {
             if (name == null)
+            {
                 throw new ArgumentNullException("name");
+            }
+
             foreach (string n in name)
             {
                 ModuleSpecificationsToImport.Add(new ModuleSpecification(n));