diff --git a/core/src/main/scala/org/apache/spark/ui/jobs/StageTable.scala b/core/src/main/scala/org/apache/spark/ui/jobs/StageTable.scala
index c5fd3ae16dc9f..99828487f1902 100644
--- a/core/src/main/scala/org/apache/spark/ui/jobs/StageTable.scala
+++ b/core/src/main/scala/org/apache/spark/ui/jobs/StageTable.scala
@@ -106,7 +106,9 @@ private[spark] class StageTable(val stages: Seq[StageInfo], val parent: JobProgr
     val description = listener.stageIdToDescription.get(s.stageId)
       .map(d => <div><em>{d}</em></div><div>{nameLink}</div>).getOrElse(nameLink)
     val finishTime = s.completionTime.getOrElse(System.currentTimeMillis())
-    val duration =  s.submissionTime.map(t => finishTime - t)
+    val duration = s.submissionTime.map { t =>
+      if (finishTime > t) finishTime - t else System.currentTimeMillis - t
+    }
 
     <tr>
       <td>{s.stageId}</td>