diff --git a/core/src/main/scala/org/apache/spark/executor/Executor.scala b/core/src/main/scala/org/apache/spark/executor/Executor.scala
index c1b57f74d7e9a84eab554e7bee02e13a0895d9eb..f7efd74e1b04393d39d7287c4d5e127192628858 100644
--- a/core/src/main/scala/org/apache/spark/executor/Executor.scala
+++ b/core/src/main/scala/org/apache/spark/executor/Executor.scala
@@ -32,7 +32,7 @@ import org.apache.spark.storage.{StorageLevel, TaskResultBlockId}
 import org.apache.spark.util.Utils
 
 /**
- * Spark executor used with Mesos and the standalone scheduler.
+ * Spark executor used with Mesos, YARN, and the standalone scheduler.
  */
 private[spark] class Executor(
     executorId: String,