diff --git a/app/Umbraco/Umbraco.Archetype/Constants.cs b/app/Umbraco/Umbraco.Archetype/Constants.cs
index 4c677e1..9bc7f0d 100644
--- a/app/Umbraco/Umbraco.Archetype/Constants.cs
+++ b/app/Umbraco/Umbraco.Archetype/Constants.cs
@@ -3,5 +3,7 @@
     public static class Constants
     {
         public const string PropertyEditorAlias = "Imulus.Archetype";
+
+        public const string PreValueAlias = "archetypeConfig";
     }
 }
diff --git a/app/Umbraco/Umbraco.Archetype/PropertyConverters/ArchetypeValueConverter.cs b/app/Umbraco/Umbraco.Archetype/PropertyConverters/ArchetypeValueConverter.cs
index de2d8fe..d9a1a23 100644
--- a/app/Umbraco/Umbraco.Archetype/PropertyConverters/ArchetypeValueConverter.cs
+++ b/app/Umbraco/Umbraco.Archetype/PropertyConverters/ArchetypeValueConverter.cs
@@ -90,7 +90,7 @@ namespace Archetype.Umbraco.PropertyConverters
 			var preValues = Services.DataTypeService.GetPreValuesCollectionByDataTypeId(dataTypeId);
 
 			var configJson = preValues.IsDictionaryBased
-				? preValues.PreValuesAsDictionary["archetypeConfig"].Value
+				? preValues.PreValuesAsDictionary[Constants.PreValueAlias].Value
 				: preValues.PreValuesAsArray.First().Value;
 
 			var config = JsonConvert.DeserializeObject<Models.ArchetypePreValue>(configJson, _jsonSettings);