diff --git a/doc/source/getting_started/on_devstack.rst b/doc/source/getting_started/on_devstack.rst
index 96200efb3..f4877c0f3 100644
--- a/doc/source/getting_started/on_devstack.rst
+++ b/doc/source/getting_started/on_devstack.rst
@@ -45,7 +45,7 @@ Configure DevStack to enable Ceilometer (if using Alarms)
 To use Ceilometer Alarms you need to enable Ceilometer in devstack.
 Adding the following lines to your `localrc` file will enable the ceilometer services::
 
-    CEILOMETER_BACKEND=mongo
+    CEILOMETER_BACKEND=mongodb
     enable_service ceilometer-acompute ceilometer-acentral ceilometer-collector ceilometer-api
     enable_service ceilometer-alarm-notifier ceilometer-alarm-evaluator