diff --git a/mayan/apps/dynamic_search/classes.py b/mayan/apps/dynamic_search/classes.py
index b4ffa51b04..9dd7c952c5 100644
--- a/mayan/apps/dynamic_search/classes.py
+++ b/mayan/apps/dynamic_search/classes.py
@@ -20,7 +20,9 @@ class SearchModel(object):
     @classmethod
     def get(cls, full_name):
         result = cls.registry[full_name]
-        result.serializer = load_backend(self.serializer_string)
+        if not hasattr(result, 'serializer'):
+            result.serializer = load_backend(result.serializer_string)
+
         return result
 
     def __init__(self, app_label, model_name, serializer_string, label=None, permission=None):