diff --git a/Circular_kernel_2/include/CGAL/Circular_kernel_2/internal_functions_on_line_arc_2.h b/Circular_kernel_2/include/CGAL/Circular_kernel_2/internal_functions_on_line_arc_2.h
index a82eaf667a4..77452010ebb 100644
--- a/Circular_kernel_2/include/CGAL/Circular_kernel_2/internal_functions_on_line_arc_2.h
+++ b/Circular_kernel_2/include/CGAL/Circular_kernel_2/internal_functions_on_line_arc_2.h
@@ -146,7 +146,7 @@ namespace CircularFunctors {
   Comparison_result 
   compare_y_to_right(const typename CK::Line_arc_2 &A1,
 		     const typename CK::Line_arc_2 &A2, 
-		     const typename CK::Circular_arc_point_2 &p)
+		     const typename CK::Circular_arc_point_2 &/*p*/)
   {
     if(A1.supporting_line().is_vertical()){
       if(A2.supporting_line().is_vertical())
diff --git a/Circular_kernel_2/test/Circular_kernel_2/include/CGAL/_test_circles_extention.h b/Circular_kernel_2/test/Circular_kernel_2/include/CGAL/_test_circles_extention.h
index 29f5f5ab1e7..165af4e8771 100644
--- a/Circular_kernel_2/test/Circular_kernel_2/include/CGAL/_test_circles_extention.h
+++ b/Circular_kernel_2/test/Circular_kernel_2/include/CGAL/_test_circles_extention.h
@@ -61,7 +61,7 @@ void _test_circle_bbox(CK ck)
   }
 }
   template <class CK>
-    void _test_circular_arc_bbox(CK ck)
+    void _test_circular_arc_bbox(CK)
   {
     typedef typename CK::Circle_2                    Circle_2;
     typedef typename CK::Circular_arc_2              Circular_arc_2;
diff --git a/Circular_kernel_2/test/Circular_kernel_2/test_Line_arc.cpp b/Circular_kernel_2/test/Circular_kernel_2/test_Line_arc.cpp
index 42c677b1d58..f3bd9d15f10 100644
--- a/Circular_kernel_2/test/Circular_kernel_2/test_Line_arc.cpp
+++ b/Circular_kernel_2/test/Circular_kernel_2/test_Line_arc.cpp
@@ -1017,7 +1017,7 @@ void _test_compare_y_at_x(CK ck)
 
 
 template <class CK>
-void _test_has_on(CK ck)
+void _test_has_on(CK)
 {
   typedef typename CK::FT                      FT;
   typedef typename CK::Circle_2                Circle_2;