diff --git a/source/core/write-concern.txt b/source/core/write-concern.txt
index 4453094d654..cbb3e0c1b69 100644
--- a/source/core/write-concern.txt
+++ b/source/core/write-concern.txt
@@ -246,7 +246,7 @@ To use this mode pass the string ``multiUse`` to the ``w`` option of
 
 .. code-block:: javascript
 
-   db.runCommand( { getLastError: 1, w: use2 } )
+   db.runCommand( { getLastError: 1, w: "use2" } )
 
 Specific Custom Write Concerns
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -291,7 +291,7 @@ To use this mode pass the string ``san`` to the ``w`` option of
 
 .. code-block:: javascript
 
-   db.runCommand( { getLastError: 1, w: san } )
+   db.runCommand( { getLastError: 1, w: "san" } )
 
 This operation will not return until a replica set member with the tag
 ``disk.san`` returns.
@@ -303,7 +303,7 @@ replica set as in the following setting:
 .. code-block:: javascript
 
    cfg = rs.conf()
-   cfg.settings.getLastErrorDefaults = { ssd:1 }
+   cfg.settings.getLastErrorDefaults = { ssd: 1 }
    rs.reconfig(cfg)
 
 .. seealso:: :ref:`replica-set-configuration-tag-sets` for further