diff --git a/include/boost/fusion/algorithm/iteration/detail/preprocessed/fold.hpp b/include/boost/fusion/algorithm/iteration/detail/preprocessed/fold.hpp
index d368338a..c89a7dda 100644
--- a/include/boost/fusion/algorithm/iteration/detail/preprocessed/fold.hpp
+++ b/include/boost/fusion/algorithm/iteration/detail/preprocessed/fold.hpp
@@ -116,7 +116,7 @@ namespace boost { namespace fusion
         {
             template<typename State, typename It0, typename F>
             static Result
-            call(State const& state,It0 const& it0, F)
+            call(State const& state,It0 const&, F)
             {
                 return static_cast<Result>(state);
             }
diff --git a/include/boost/fusion/algorithm/iteration/detail/preprocessed/reverse_fold.hpp b/include/boost/fusion/algorithm/iteration/detail/preprocessed/reverse_fold.hpp
index 71730abf..48a41344 100644
--- a/include/boost/fusion/algorithm/iteration/detail/preprocessed/reverse_fold.hpp
+++ b/include/boost/fusion/algorithm/iteration/detail/preprocessed/reverse_fold.hpp
@@ -115,7 +115,7 @@ namespace boost { namespace fusion
         {
             template<typename State, typename It0, typename F>
             static Result
-            call(State const& state,It0 const& it0, F)
+            call(State const& state,It0 const&, F)
             {
                 return static_cast<Result>(state);
             }
diff --git a/include/boost/fusion/algorithm/query/detail/any.hpp b/include/boost/fusion/algorithm/query/detail/any.hpp
index 42409d5a..5f6b8577 100644
--- a/include/boost/fusion/algorithm/query/detail/any.hpp
+++ b/include/boost/fusion/algorithm/query/detail/any.hpp
@@ -109,7 +109,7 @@ namespace detail
     struct unrolled_any<0>
     {
         template <typename It, typename F>
-        static bool call(It const& it, F f)
+        static bool call(It const&, F)
         {
             return false;
         }
diff --git a/include/boost/fusion/iterator/iterator_adapter.hpp b/include/boost/fusion/iterator/iterator_adapter.hpp
index 68056269..9077f8fa 100644
--- a/include/boost/fusion/iterator/iterator_adapter.hpp
+++ b/include/boost/fusion/iterator/iterator_adapter.hpp
@@ -23,8 +23,8 @@ namespace boost { namespace fusion
         iterator_base_type;
         iterator_base_type iterator_base;
 
-        iterator_adapter(iterator_base_type const& iterator_base)
-            : iterator_base(iterator_base) {}
+        iterator_adapter(iterator_base_type const& iterator_base_)
+            : iterator_base(iterator_base_) {}
 
         // default implementation
         template <typename I1, typename I2>
diff --git a/include/boost/fusion/sequence/intrinsic/has_key.hpp b/include/boost/fusion/sequence/intrinsic/has_key.hpp
index 1ff05bad..9e0969a9 100644
--- a/include/boost/fusion/sequence/intrinsic/has_key.hpp
+++ b/include/boost/fusion/sequence/intrinsic/has_key.hpp
@@ -68,7 +68,7 @@ namespace boost { namespace fusion
 
     template <typename Key, typename Sequence>
     inline typename result_of::has_key<Sequence, Key>::type
-    has_key(Sequence const& seq)
+    has_key(Sequence const&)
     {
         typedef typename result_of::has_key<Sequence, Key>::type result;
         return result();