diff --git a/Hash_map/test/Hash_map/Hash.cpp b/Hash_map/test/Hash_map/Hash.cpp
index 428d152a1c8..5e2a51ce937 100644
--- a/Hash_map/test/Hash_map/Hash.cpp
+++ b/Hash_map/test/Hash_map/Hash.cpp
@@ -18,7 +18,7 @@ typedef CGAL::Triangulation_2<Kernel> Triangulation_2;
 
 template <typename P>
 void
-fct(const P& p)
+fct(const P& )
 {
   typedef typename boost::graph_traits<P>::vertex_descriptor vertex_descriptor;