diff --git a/src/main/scala/predict/Predictor.scala b/src/main/scala/predict/Predictor.scala
index 013030adc90f2d3ead2f83dbf2669a5e2161a91c..91ba1fbe8fa7b30ca9c0f0a5ea5d94df76139790 100644
--- a/src/main/scala/predict/Predictor.scala
+++ b/src/main/scala/predict/Predictor.scala
@@ -76,22 +76,26 @@ object Predictor extends App {
               "DurationInMicrosecForGlobalMethod" -> Map(
                 "min" -> 0.0,  // Datatype of answer: Double
                 "max" -> 0.0,  // Datatype of answer: Double
-                "average" -> 0.0 // Datatype of answer: Double
+                "average" -> 0.0, // Datatype of answer: Double
+                "stddev" -> 0.0 // Datatype of answer: Double
               ),
               "DurationInMicrosecForPerUserMethod" -> Map(
                 "min" -> 0.0,  // Datatype of answer: Double
                 "max" -> 0.0,  // Datatype of answer: Double
-                "average" -> 0.0 // Datatype of answer: Double
+                "average" -> 0.0, // Datatype of answer: Double
+                "stddev" -> 0.0 // Datatype of answer: Double
               ),
               "DurationInMicrosecForPerItemMethod" -> Map(
                 "min" -> 0.0,  // Datatype of answer: Double
                 "max" -> 0.0,  // Datatype of answer: Double
-                "average" -> 0.0 // Datatype of answer: Double
+                "average" -> 0.0, // Datatype of answer: Double
+                "stddev" -> 0.0 // Datatype of answer: Double
               ),
               "DurationInMicrosecForBaselineMethod" -> Map(
                 "min" -> 0.0,  // Datatype of answer: Double
                 "max" -> 0.0, // Datatype of answer: Double
-                "average" -> 0.0 // Datatype of answer: Double
+                "average" -> 0.0, // Datatype of answer: Double
+                "stddev" -> 0.0 // Datatype of answer: Double
               ),
               "RatioBetweenBaselineMethodAndGlobalMethod" -> 0.0 // Datatype of answer: Double
             ),