diff --git a/src/Umbraco.Core/Models/PropertyType.cs b/src/Umbraco.Core/Models/PropertyType.cs
index 34775ccf89..61736607c6 100644
--- a/src/Umbraco.Core/Models/PropertyType.cs
+++ b/src/Umbraco.Core/Models/PropertyType.cs
@@ -114,7 +114,7 @@ namespace Umbraco.Core.Models
         /// Gets of sets the alias of the property type.
         /// </summary>
         [DataMember]
-        public string Alias
+        public virtual string Alias
         {
             get => _alias;
             set => SetPropertyValueAndDetectChanges(SanitizeAlias(value), ref _alias, nameof(Alias));