diff --git a/docs/usage.rst b/docs/usage.rst
index 9f99c4f7c..b68697966 100644
--- a/docs/usage.rst
+++ b/docs/usage.rst
@@ -81,8 +81,7 @@ can be supplied::
     .. code-block:: ruby
 
         {
-            // dont group events from the same NODE_ENV together
-            :fingerprint => ['{{ default }}', process.env.NODE_ENV]
+            :fingerprint => ['{{ default }}', 'other value']
         }
 
 .. describe:: level