diff --git a/include/boost/function/function_base.hpp b/include/boost/function/function_base.hpp
index c297847..98abc0f 100644
--- a/include/boost/function/function_base.hpp
+++ b/include/boost/function/function_base.hpp
@@ -522,65 +522,6 @@ namespace boost {
       // A type that is only used for comparisons against zero
       struct useless_clear_type {};
 
-#ifdef BOOST_NO_SFINAE
-      // These routines perform comparisons between a Boost.Function
-      // object and an arbitrary function object (when the last
-      // parameter is false_type) or against zero (when the
-      // last parameter is true_type). They are only necessary
-      // for compilers that don't support SFINAE.
-      template<typename Function, typename Functor>
-        bool
-        compare_equal(const Function& f, const Functor&, int, true_type)
-        { return f.empty(); }
-
-      template<typename Function, typename Functor>
-        bool
-        compare_not_equal(const Function& f, const Functor&, int,
-                          true_type)
-        { return !f.empty(); }
-
-      template<typename Function, typename Functor>
-        bool
-        compare_equal(const Function& f, const Functor& g, long,
-                      false_type)
-        {
-          if (const Functor* fp = f.template target<Functor>())
-            return function_equal(*fp, g);
-          else return false;
-        }
-
-      template<typename Function, typename Functor>
-        bool
-        compare_equal(const Function& f, const reference_wrapper<Functor>& g,
-                      int, false_type)
-        {
-          if (const Functor* fp = f.template target<Functor>())
-            return fp == g.get_pointer();
-          else return false;
-        }
-
-      template<typename Function, typename Functor>
-        bool
-        compare_not_equal(const Function& f, const Functor& g, long,
-                          false_type)
-        {
-          if (const Functor* fp = f.template target<Functor>())
-            return !function_equal(*fp, g);
-          else return true;
-        }
-
-      template<typename Function, typename Functor>
-        bool
-        compare_not_equal(const Function& f,
-                          const reference_wrapper<Functor>& g, int,
-                          false_type)
-        {
-          if (const Functor* fp = f.template target<Functor>())
-            return fp != g.get_pointer();
-          else return true;
-        }
-#endif // BOOST_NO_SFINAE
-
       /**
        * Stores the "manager" portion of the vtable for a
        * boost::function object.
@@ -705,7 +646,6 @@ public:
 #   pragma clang diagnostic pop
 #endif
 
-#ifndef BOOST_NO_SFINAE
 inline bool operator==(const function_base& f,
                        detail::function::useless_clear_type*)
 {
@@ -729,38 +669,6 @@ inline bool operator!=(detail::function::useless_clear_type*,
 {
   return !f.empty();
 }
-#endif
-
-#ifdef BOOST_NO_SFINAE
-// Comparisons between boost::function objects and arbitrary function objects
-template<typename Functor>
-  inline bool operator==(const function_base& f, Functor g)
-  {
-    typedef integral_constant<bool, (is_integral<Functor>::value)> integral;
-    return detail::function::compare_equal(f, g, 0, integral());
-  }
-
-template<typename Functor>
-  inline bool operator==(Functor g, const function_base& f)
-  {
-    typedef integral_constant<bool, (is_integral<Functor>::value)> integral;
-    return detail::function::compare_equal(f, g, 0, integral());
-  }
-
-template<typename Functor>
-  inline bool operator!=(const function_base& f, Functor g)
-  {
-    typedef integral_constant<bool, (is_integral<Functor>::value)> integral;
-    return detail::function::compare_not_equal(f, g, 0, integral());
-  }
-
-template<typename Functor>
-  inline bool operator!=(Functor g, const function_base& f)
-  {
-    typedef integral_constant<bool, (is_integral<Functor>::value)> integral;
-    return detail::function::compare_not_equal(f, g, 0, integral());
-  }
-#else
 
 // Comparisons between boost::function objects and arbitrary function
 // objects.
@@ -837,8 +745,6 @@ template<typename Functor>
     else return true;
   }
 
-#endif // Compiler supporting SFINAE
-
 namespace detail {
   namespace function {
     inline bool has_empty_target(const function_base* f)
diff --git a/include/boost/function/function_template.hpp b/include/boost/function/function_template.hpp
index 006ca90..aed8b5f 100644
--- a/include/boost/function/function_template.hpp
+++ b/include/boost/function/function_template.hpp
@@ -698,11 +698,9 @@ namespace boost {
     // one with a default parameter.
     template<typename Functor>
     BOOST_FUNCTION_FUNCTION(Functor f
-#ifndef BOOST_NO_SFINAE
                             ,typename boost::enable_if_<
                              !(is_integral<Functor>::value),
                                         int>::type = 0
-#endif // BOOST_NO_SFINAE
                             ) :
       function_base()
     {
@@ -710,25 +708,16 @@ namespace boost {
     }
     template<typename Functor,typename Allocator>
     BOOST_FUNCTION_FUNCTION(Functor f, Allocator a
-#ifndef BOOST_NO_SFINAE
                             ,typename boost::enable_if_<
                               !(is_integral<Functor>::value),
                                         int>::type = 0
-#endif // BOOST_NO_SFINAE
                             ) :
       function_base()
     {
       this->assign_to_a(f,a);
     }
 
-#ifndef BOOST_NO_SFINAE
     BOOST_FUNCTION_FUNCTION(clear_type*) : function_base() { }
-#else
-    BOOST_FUNCTION_FUNCTION(int zero) : function_base()
-    {
-      BOOST_ASSERT(zero == 0);
-    }
-#endif
 
     BOOST_FUNCTION_FUNCTION(const BOOST_FUNCTION_FUNCTION& f) : function_base()
     {
@@ -759,13 +748,9 @@ namespace boost {
     // handle BOOST_FUNCTION_FUNCTION as the type of the temporary to
     // construct.
     template<typename Functor>
-#ifndef BOOST_NO_SFINAE
     typename boost::enable_if_<
                   !(is_integral<Functor>::value),
                BOOST_FUNCTION_FUNCTION&>::type
-#else
-    BOOST_FUNCTION_FUNCTION&
-#endif
     operator=(Functor f)
     {
       this->clear();
@@ -791,20 +776,11 @@ namespace boost {
       BOOST_CATCH_END
     }
 
-#ifndef BOOST_NO_SFINAE
     BOOST_FUNCTION_FUNCTION& operator=(clear_type*)
     {
       this->clear();
       return *this;
     }
-#else
-    BOOST_FUNCTION_FUNCTION& operator=(int zero)
-    {
-      BOOST_ASSERT(zero == 0);
-      this->clear();
-      return *this;
-    }
-#endif
 
     // Assignment from another BOOST_FUNCTION_FUNCTION
     BOOST_FUNCTION_FUNCTION& operator=(const BOOST_FUNCTION_FUNCTION& f)
@@ -1082,30 +1058,24 @@ public:
 
   template<typename Functor>
   function(Functor f
-#ifndef BOOST_NO_SFINAE
            ,typename boost::enable_if_<
                           !(is_integral<Functor>::value),
                        int>::type = 0
-#endif
            ) :
     base_type(f)
   {
   }
   template<typename Functor,typename Allocator>
   function(Functor f, Allocator a
-#ifndef BOOST_NO_SFINAE
            ,typename boost::enable_if_<
                            !(is_integral<Functor>::value),
                        int>::type = 0
-#endif
            ) :
     base_type(f,a)
   {
   }
 
-#ifndef BOOST_NO_SFINAE
   function(clear_type*) : base_type() {}
-#endif
 
   function(const self_type& f) : base_type(static_cast<const base_type&>(f)){}
 
@@ -1132,26 +1102,20 @@ public:
 #endif
 
   template<typename Functor>
-#ifndef BOOST_NO_SFINAE
   typename boost::enable_if_<
                          !(is_integral<Functor>::value),
                       self_type&>::type
-#else
-  self_type&
-#endif
   operator=(Functor f)
   {
     self_type(f).swap(*this);
     return *this;
   }
 
-#ifndef BOOST_NO_SFINAE
   self_type& operator=(clear_type*)
   {
     this->clear();
     return *this;
   }
-#endif
 
   self_type& operator=(const base_type& f)
   {