diff --git a/Alpha_wrap_3/include/CGAL/Alpha_wrap_3/internal/Alpha_wrap_3.h b/Alpha_wrap_3/include/CGAL/Alpha_wrap_3/internal/Alpha_wrap_3.h
index 8529af0b0f2..d3d2beb6c6e 100644
--- a/Alpha_wrap_3/include/CGAL/Alpha_wrap_3/internal/Alpha_wrap_3.h
+++ b/Alpha_wrap_3/include/CGAL/Alpha_wrap_3/internal/Alpha_wrap_3.h
@@ -95,7 +95,7 @@ struct Wrapping_default_visitor
   void on_flood_fill_begin(const AlphaWrapper&) { }
 
   template <typename Wrapper>
-  constexpr bool go_further(const Wrapper& wrapper) { return true; }
+  constexpr bool go_further(const Wrapper&) { return true; }
 
   template <typename AlphaWrapper, typename Gate>
   void before_facet_treatment(const AlphaWrapper&, const Gate&) { }
diff --git a/Alpha_wrap_3/include/CGAL/Alpha_wrap_3/internal/gate_priority_queue.h b/Alpha_wrap_3/include/CGAL/Alpha_wrap_3/internal/gate_priority_queue.h
index f7947f246a4..ec48b4f458b 100644
--- a/Alpha_wrap_3/include/CGAL/Alpha_wrap_3/internal/gate_priority_queue.h
+++ b/Alpha_wrap_3/include/CGAL/Alpha_wrap_3/internal/gate_priority_queue.h
@@ -121,7 +121,7 @@ public:
 public:
   const Facet& facet() const { return m_facet; }
 
-  const bool is_zombie() const
+  bool is_zombie() const
   {
     return (m_facet.first->erase_counter() != m_erase_counter_mem) ||
            (m_mirror_facet.first->erase_counter() != m_mirror_erase_counter_mem);