diff --git a/src/cpp/flann/flann.hpp b/src/cpp/flann/flann.hpp
index 036f7363ed5317502b1727ac49ad663452e71629..4ec2fe5a68c7e28e2f39675cbfc6b47821316967 100644
--- a/src/cpp/flann/flann.hpp
+++ b/src/cpp/flann/flann.hpp
@@ -192,7 +192,7 @@ void Index<Distance>::knnSearch(const Matrix<ElementType>& queries, Matrix<int>&
     assert(int(indices.cols) >= knn);
     assert(int(dists.cols) >= knn);
 
-#if 1
+#if 0
     KNNResultSet<DistanceType> resultSet(knn);
     for (size_t i = 0; i < queries.rows; i++) {
         resultSet.init(indices[i], dists[i]);