diff --git a/include/boost/tuple/detail/tuple_basic.hpp b/include/boost/tuple/detail/tuple_basic.hpp
index a1d3284..9341fbc 100644
--- a/include/boost/tuple/detail/tuple_basic.hpp
+++ b/include/boost/tuple/detail/tuple_basic.hpp
@@ -362,7 +362,7 @@ struct cons {
 
   template <class T2, class T3, class T4, class T5,
             class T6, class T7, class T8, class T9, class T10>
-  cons( const null_type& t1, T2& t2, T3& t3, T4& t4, T5& t5,
+  cons( const null_type& /*t1*/, T2& t2, T3& t3, T4& t4, T5& t5,
         T6& t6, T7& t7, T8& t8, T9& t9, T10& t10 )
     : head (),
       tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull())