diff --git a/include/boost/function/function_template.hpp b/include/boost/function/function_template.hpp
index c6e6676..3aacea1 100644
--- a/include/boost/function/function_template.hpp
+++ b/include/boost/function/function_template.hpp
@@ -290,7 +290,7 @@ namespace boost {
 
         // Function pointers
         template<typename FunctionPtr>
-        void init(FunctionPtr f, function_ptr_tag)
+        void init(FunctionPtr /*f*/, function_ptr_tag)
         {
           typedef typename BOOST_FUNCTION_GET_FUNCTION_INVOKER<
                              FunctionPtr,