diff --git a/include/boost/function/function_template.hpp b/include/boost/function/function_template.hpp
index b0d01b8..c6e6676 100644
--- a/include/boost/function/function_template.hpp
+++ b/include/boost/function/function_template.hpp
@@ -346,7 +346,7 @@ namespace boost {
 
         // Function objects
         template<typename FunctionObj>
-        void init(FunctionObj f, function_obj_tag)
+        void init(FunctionObj /*f*/, function_obj_tag)
         {
           typedef typename BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER<
                              FunctionObj,
@@ -404,7 +404,7 @@ namespace boost {
         // Reference to a function object
         template<typename FunctionObj>
         void 
-        init(const reference_wrapper<FunctionObj>& f, function_obj_ref_tag)
+        init(const reference_wrapper<FunctionObj>& /*f*/, function_obj_ref_tag)
         {
           typedef typename BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER<
                              FunctionObj,