diff --git a/source/core/master-slave.txt b/source/core/master-slave.txt
index df203488e0e..b04138b21ee 100644
--- a/source/core/master-slave.txt
+++ b/source/core/master-slave.txt
@@ -67,7 +67,6 @@ specifying the master instance, as in the following
 operation in the :program:`mongo` shell:
 
 .. code-block:: javascript
-   :linenos:
 
    use local
    db.sources.find()