diff --git a/src/server/services/factory.js b/src/server/services/factory.js
index 68da858..fe98657 100644
--- a/src/server/services/factory.js
+++ b/src/server/services/factory.js
@@ -60,7 +60,7 @@ function ensureMemoized(clientInstance) {
     }
   });
   
-  clientInstance.___hasBeenMemoized = true;
+  clientInstance.__hasBeenMemoized = true;
   return clientInstance;
 }