diff --git a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/NewAliasCommand.cs b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/NewAliasCommand.cs
index 8ae43a6e4fd..3428b377da3 100644
--- a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/NewAliasCommand.cs
+++ b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/NewAliasCommand.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
 
+using System;
 using System.Management.Automation;
 using System.Management.Automation.Internal;
 
@@ -82,6 +83,16 @@ protected override void ProcessRecord()
 
                 AliasInfo result = null;
 
+                if (string.Equals(newAlias.Name, newAlias.Definition, StringComparison.OrdinalIgnoreCase))
+                {
+                    PSArgumentException e = PSTraceSource.NewArgumentException("Value", NewObjectStrings.InvalidValue, newAlias.Name);
+                    WriteError(
+                        new ErrorRecord(
+                            e.ErrorRecord,
+                            e));
+                    return;
+                }
+
                 try
                 {
                     if (string.IsNullOrEmpty(Scope))
diff --git a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/SetAliasCommand.cs b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/SetAliasCommand.cs
index 6c0007fa2a2..2732f1a4381 100644
--- a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/SetAliasCommand.cs
+++ b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/SetAliasCommand.cs
@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
 
+using System;
 using System.Management.Automation;
 using System.Management.Automation.Internal;
 
@@ -42,6 +43,16 @@ protected override void ProcessRecord()
 
                 AliasInfo result = null;
 
+                if (string.Equals(aliasToSet.Name, aliasToSet.Definition, StringComparison.OrdinalIgnoreCase))
+                {
+                    PSArgumentException e = PSTraceSource.NewArgumentException("Value", NewObjectStrings.InvalidValue, aliasToSet.Name);
+                    WriteError(
+                        new ErrorRecord(
+                            e.ErrorRecord,
+                            e));
+                    return;
+                }
+
                 try
                 {
                     if (string.IsNullOrEmpty(Scope))