diff --git a/include/boost/functional/hash/deque.hpp b/include/boost/functional/hash/deque.hpp
index fda006e..2b1db09 100644
--- a/include/boost/functional/hash/deque.hpp
+++ b/include/boost/functional/hash/deque.hpp
@@ -15,7 +15,6 @@
 #endif
 
 #include <boost/config.hpp>
-#include <deque>
 #include <boost/functional/hash/hash.hpp>
 
 namespace boost
diff --git a/include/boost/functional/hash/hash.hpp b/include/boost/functional/hash/hash.hpp
index 0ff794e..b337dbd 100644
--- a/include/boost/functional/hash/hash.hpp
+++ b/include/boost/functional/hash/hash.hpp
@@ -18,11 +18,11 @@
 #include <boost/config.hpp>
 #include <cstddef>
 #include <cmath>
-#include <string>
 #include <functional>
 #include <errno.h>
 #include <boost/limits.hpp>
 #include <boost/functional/detail/float_functions.hpp>
+#include <boost/functional/detail/container_fwd.hpp>
 #include <boost/detail/workaround.hpp>
 
 #if defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
diff --git a/include/boost/functional/hash/list.hpp b/include/boost/functional/hash/list.hpp
index ac1ed75..6906598 100644
--- a/include/boost/functional/hash/list.hpp
+++ b/include/boost/functional/hash/list.hpp
@@ -16,7 +16,6 @@
 #endif
 
 #include <boost/config.hpp>
-#include <list>
 #include <boost/functional/hash/hash.hpp>
 
 namespace boost
diff --git a/include/boost/functional/hash/map.hpp b/include/boost/functional/hash/map.hpp
index d127f45..fc9ab6e 100644
--- a/include/boost/functional/hash/map.hpp
+++ b/include/boost/functional/hash/map.hpp
@@ -16,7 +16,6 @@
 #endif
 
 #include <boost/config.hpp>
-#include <map>
 #include <boost/functional/hash/hash.hpp>
 #include <boost/functional/hash/pair.hpp>
 
diff --git a/include/boost/functional/hash/pair.hpp b/include/boost/functional/hash/pair.hpp
index cbd9d6c..9c9c307 100644
--- a/include/boost/functional/hash/pair.hpp
+++ b/include/boost/functional/hash/pair.hpp
@@ -16,7 +16,6 @@
 #endif
 
 #include <boost/config.hpp>
-#include <utility>
 #include <boost/functional/hash/hash.hpp>
 
 namespace boost
diff --git a/include/boost/functional/hash/set.hpp b/include/boost/functional/hash/set.hpp
index 04ce716..6e9d6c2 100644
--- a/include/boost/functional/hash/set.hpp
+++ b/include/boost/functional/hash/set.hpp
@@ -16,7 +16,6 @@
 #endif
 
 #include <boost/config.hpp>
-#include <set>
 #include <boost/functional/hash/hash.hpp>
 
 namespace boost
diff --git a/include/boost/functional/hash/vector.hpp b/include/boost/functional/hash/vector.hpp
index 111bec5..5fbda6a 100644
--- a/include/boost/functional/hash/vector.hpp
+++ b/include/boost/functional/hash/vector.hpp
@@ -16,7 +16,6 @@
 #endif
 
 #include <boost/config.hpp>
-#include <vector>
 #include <boost/functional/hash/hash.hpp>
 
 namespace boost