1 files changed, 1 insertions, 1 deletions
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;