diff --git a/plugins/mongodb/mongo_lag b/plugins/mongodb/mongo_lag
index b494e4bc..1229b971 100755
--- a/plugins/mongodb/mongo_lag
+++ b/plugins/mongodb/mongo_lag
@@ -20,6 +20,11 @@ Default for host is 127.0.0.1 and port 27017 and will work without being defined
     env.username user
     env.password P@55w0rd
 
+    or
+
+    [mongo_lag]
+    env.MONGO_DB_URI mongodb://user:passwd@127.0.0.1:27017
+
 =head1 AUTHOR
 
 Stefan Andersen <stefan@stefanandersen.dk>
@@ -44,14 +49,17 @@ import sys
 import pymongo
 
 def _get_members():
-    host = os.environ.get('host', '127.0.0.1')
-    port = os.environ.get('port', 27017)
-    username = os.environ.get('username', '')
-    password = os.environ.get('password', '')
-    conn = pymongo.MongoClient(host, int(port))
-    if username:
-        connAuth = conn['admin']
-        connAuth.authenticate(username, password)
+    if 'MONGO_DB_URI' in os.environ:
+        conn = pymongo.MongoClient(os.environ['MONGO_DB_URI'])
+    else:
+        host = os.environ.get('host', '127.0.0.1')
+        port = os.environ.get('port', 27017)
+        username = os.environ.get('username', '')
+        password = os.environ.get('password', '')
+        conn = pymongo.MongoClient(host, int(port))
+        if username:
+            connAuth = conn['admin']
+            connAuth.authenticate(username, password)
 
     repl_status = conn.admin.command("replSetGetStatus")