diff --git a/src/Microsoft.ML.FastTree/FastTreeRanking.cs b/src/Microsoft.ML.FastTree/FastTreeRanking.cs
index 7f89858e008..cf17a0d2bee 100644
--- a/src/Microsoft.ML.FastTree/FastTreeRanking.cs
+++ b/src/Microsoft.ML.FastTree/FastTreeRanking.cs
@@ -343,6 +343,9 @@ protected override void CustomizedTrainingIteration(RegressionTree tree)
         /// <returns>standard test for the dataset</returns>
         private Test CreateStandardTest(Dataset dataset)
         {
+            if (dataset.MaxDcg.Length == 0)
+                dataset.Skeleton.RecomputeMaxDcg(10);
+
             return new NdcgTest(
                 ConstructScoreTracker(dataset),
                 dataset.Ratings,