2 files changed, 2 insertions, 2 deletions
diff --git a/src/Witness_complex/include/gudhi/Active_witness/Active_witness.h b/src/Witness_complex/include/gudhi/Active_witness/Active_witness.h
index f64701fa..08762fb3 100644
--- a/src/Witness_complex/include/gudhi/Active_witness/Active_witness.h
+++ b/src/Witness_complex/include/gudhi/Active_witness/Active_witness.h
@@ -49,7 +49,7 @@ public:
   INS_iterator iterator_next_;
   INS_iterator iterator_end_;
 
-  Active_witness(INS_range search_range)
+  Active_witness(const INS_range& search_range)
     : search_range_(search_range), iterator_next_(search_range_.begin()), iterator_end_(search_range_.end())
   {
     //nearest_landmark_table_.push_back(*iterator_last_);
diff --git a/src/Witness_complex/include/gudhi/Active_witness/Active_witness_iterator.h b/src/Witness_complex/include/gudhi/Active_witness/Active_witness_iterator.h
index c1d2091a..d6ea6403 100644
--- a/src/Witness_complex/include/gudhi/Active_witness/Active_witness_iterator.h
+++ b/src/Witness_complex/include/gudhi/Active_witness/Active_witness_iterator.h
@@ -62,7 +62,7 @@ public:
   {
   }
 
-  Active_witness_iterator(Active_witness* aw, Pair_iterator lh)
+  Active_witness_iterator(Active_witness* aw, const Pair_iterator& lh)
     : aw_(aw), lh_(lh)
   {
     is_end_ = false;