diff --git a/osm_common/dbmongo.py b/osm_common/dbmongo.py
index b0686aa..56f387b 100644
--- a/osm_common/dbmongo.py
+++ b/osm_common/dbmongo.py
@@ -99,9 +99,9 @@
                 self.database_key = master_key
                 self.set_secret_key(master_key)
             if config.get("uri"):
-                self.client = MongoClient(config["uri"])
+                self.client = MongoClient(config["uri"], replicaSet=config.get("replicaset", None))
             else:
-                self.client = MongoClient(config["host"], config["port"])
+                self.client = MongoClient(config["host"], config["port"], replicaSet=config.get("replicaset", None))
             # TODO add as parameters also username=config.get("user"), password=config.get("password"))
             # when all modules are ready
             self.db = self.client[config["name"]]