diff --git a/core/src/main/scala/org/apache/spark/deploy/JsonProtocol.scala b/core/src/main/scala/org/apache/spark/deploy/JsonProtocol.scala
index ad74f5604f356a8a5128b1e1b5558e9becb81a2c..04d01c169d3e5d36d303599bf5cb150235546549 100644
--- a/core/src/main/scala/org/apache/spark/deploy/JsonProtocol.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/JsonProtocol.scala
@@ -41,6 +41,7 @@ private[spark] object JsonProtocol {
     ("starttime" -> obj.startTime) ~
     ("id" -> obj.id) ~
     ("name" -> obj.desc.name) ~
+    ("appuiurl" -> obj.appUiUrl) ~
     ("cores" -> obj.desc.maxCores) ~
     ("user" ->  obj.desc.user) ~
     ("memoryperslave" -> obj.desc.memoryPerSlave) ~