diff --git a/app/com/linkedin/drelephant/mapreduce/MapReduceMetricsAggregator.java b/app/com/linkedin/drelephant/mapreduce/MapReduceMetricsAggregator.java
index 8d2004c0e..c83dc6bce 100644
--- a/app/com/linkedin/drelephant/mapreduce/MapReduceMetricsAggregator.java
+++ b/app/com/linkedin/drelephant/mapreduce/MapReduceMetricsAggregator.java
@@ -59,7 +59,7 @@ public void aggregate(HadoopApplicationData hadoopData) {
     //overwrite reduceTaskSlowStartPercentage to 100%. TODO: make use of the slow start percent
     reduceTaskSlowStartPercentage = 100;
 
-    mapTasks = new TaskLevelAggregatedMetrics(data.getMapperData(), mapTaskContainerSize, data.getStartTime());
+    mapTasks = new TaskLevelAggregatedMetrics(data.getMapperData(), mapTaskContainerSize, data.getSubmitTime());
 
     long reduceIdealStartTime = mapTasks.getNthPercentileFinishTime(reduceTaskSlowStartPercentage);