2 files changed, 4 insertions, 4 deletions
diff --git a/src/Spatial_searching/example/example_spatial_searching.cpp b/src/Spatial_searching/example/example_spatial_searching.cpp
index 8f9151fc..09c2dabf 100644
--- a/src/Spatial_searching/example/example_spatial_searching.cpp
+++ b/src/Spatial_searching/example/example_spatial_searching.cpp
@@ -25,7 +25,7 @@ int main(void) {
   // 10-nearest neighbor query
   std::clog << "10 nearest neighbors from points[20]:\n";
   auto knn_range = points_ds.k_nearest_neighbors(points[20], 10, true);
-  for (auto const& nghb : knn_range)
+  for (auto const nghb : knn_range)
     std::clog << nghb.first << " (sq. dist. = " << nghb.second << ")\n";
 
   // Incremental nearest neighbor query
@@ -38,7 +38,7 @@ int main(void) {
   // 10-furthest neighbor query
   std::clog << "10 furthest neighbors from points[20]:\n";
   auto kfn_range = points_ds.k_furthest_neighbors(points[20], 10, true);
-  for (auto const& nghb : kfn_range)
+  for (auto const nghb : kfn_range)
     std::clog << nghb.first << " (sq. dist. = " << nghb.second << ")\n";
 
   // Incremental furthest neighbor query
diff --git a/src/Spatial_searching/test/test_Kd_tree_search.cpp b/src/Spatial_searching/test/test_Kd_tree_search.cpp
index d6c6fba3..e9acfaa7 100644
--- a/src/Spatial_searching/test/test_Kd_tree_search.cpp
+++ b/src/Spatial_searching/test/test_Kd_tree_search.cpp
@@ -45,7 +45,7 @@ BOOST_AUTO_TEST_CASE(test_Kd_tree_search) {
 
   std::vector<std::size_t> knn_result;
   FT last_dist = -1.;
-  for (auto const& nghb : kns_range) {
+  for (auto const nghb : kns_range) {
     BOOST_CHECK(nghb.second > last_dist);
     knn_result.push_back(nghb.second);
     last_dist = nghb.second;
@@ -76,7 +76,7 @@ BOOST_AUTO_TEST_CASE(test_Kd_tree_search) {
 
   std::vector<std::size_t> kfn_result;
   last_dist = kfn_range.begin()->second;
-  for (auto const& nghb : kfn_range) {
+  for (auto const nghb : kfn_range) {
     BOOST_CHECK(nghb.second <= last_dist);
     kfn_result.push_back(nghb.second);
     last_dist = nghb.second;