diff --git a/source/core/master-slave.txt b/source/core/master-slave.txt
index 74040463824..3e7de1e51cd 100644
--- a/source/core/master-slave.txt
+++ b/source/core/master-slave.txt
@@ -70,7 +70,7 @@ operation in the :program:`mongo` shell:
 
    use local
    db.sources.find()
-   db.sources.insert( { host: <masterhostname> <,only: databasename> } );
+   db.sources.insert( { host: <masterhostname> <,only: <databasename>> } );
 
 In line 1, you switch context to the ``local`` database. In line 2,
 the :method:`~db.collection.find()` operation should return no