1 files changed, 3 insertions, 1 deletions
diff --git a/src/Witness_complex/include/gudhi/Landmark_choice_by_random_point.h b/src/Witness_complex/include/gudhi/Landmark_choice_by_random_point.h
index 038deff6..a54f3848 100644
--- a/src/Witness_complex/include/gudhi/Landmark_choice_by_random_point.h
+++ b/src/Witness_complex/include/gudhi/Landmark_choice_by_random_point.h
@@ -46,7 +46,9 @@ public:
     
     template <typename KNearestNeighbours,
               typename Point_random_access_range>                 
-    Landmark_choice_by_random_point(Point_random_access_range &points, int nbL, KNearestNeighbours &knn)
+    Landmark_choice_by_random_point(Point_random_access_range const &points,
+                                    int nbL,
+                                    KNearestNeighbours &knn)
     {
       int nbP = points.end() - points.begin();
       std::set<int> landmarks;