diff --git a/docs/monitoring.md b/docs/monitoring.md
index 5804e4f26cd93ac383f8ae862a0f54b85b34421b..5bc5e18c4d45fac775d639a81db94ad4d35d31cc 100644
--- a/docs/monitoring.md
+++ b/docs/monitoring.md
@@ -377,6 +377,7 @@ set of sinks to which metrics are reported. The following instances are currentl
 * `worker`: A Spark standalone worker process.
 * `executor`: A Spark executor.
 * `driver`: The Spark driver process (the process in which your SparkContext is created).
+* `shuffleService`: The Spark shuffle service.
 
 Each instance can report to zero or more _sinks_. Sinks are contained in the
 `org.apache.spark.metrics.sink` package: