diff --git a/src/modules/Elsa.MongoDb/Features/MongoDbFeature.cs b/src/modules/Elsa.MongoDb/Features/MongoDbFeature.cs
index e5d716fa0..7d01f8d65 100644
--- a/src/modules/Elsa.MongoDb/Features/MongoDbFeature.cs
+++ b/src/modules/Elsa.MongoDb/Features/MongoDbFeature.cs
@@ -80,6 +80,7 @@ public class MongoDbFeature : FeatureBase
         {
             map.AutoMap();
             map.SetIgnoreExtraElements(true); // Needed for missing ID property
+            map.MapProperty(x => x.Key); // Needed for non-setter property
         });
     }