diff --git a/modules/ml/src/tree.cpp b/modules/ml/src/tree.cpp
index c02b7440e7..4b3079b3d1 100644
--- a/modules/ml/src/tree.cpp
+++ b/modules/ml/src/tree.cpp
@@ -632,6 +632,7 @@ void DTreesImpl::calcValue( int nidx, const vector<int>& _sidx )
         }
 
         node->node_risk = sum2 - (sum/sumw)*sum;
+        node->node_risk /= sumw;
         node->value = sum/sumw;
     }
 }