diff --git a/include/boost/algorithm/string/detail/classification.hpp b/include/boost/algorithm/string/detail/classification.hpp
index 9a34bf0..fb43955 100644
--- a/include/boost/algorithm/string/detail/classification.hpp
+++ b/include/boost/algorithm/string/detail/classification.hpp
@@ -32,8 +32,8 @@ namespace boost {
             struct is_classifiedF :
                 public predicate_facade<is_classifiedF>
             {
-                // Boost.Lambda support
-                template <class Args> struct sig { typedef bool type; };
+                // Boost.ResultOf support
+                typedef bool result_type;
 
                 // Constructor from a locale
                 is_classifiedF(std::ctype_base::mask Type, std::locale const & Loc = std::locale()) :
@@ -72,8 +72,8 @@ namespace boost {
                 typedef typename ::boost::remove_const<CharT>::type set_value_type;
 
             public:     
-                // Boost.Lambda support
-                template <class Args> struct sig { typedef bool type; };
+                // Boost.ResultOf support
+                typedef bool result_type;
 
                 // Constructor
                 template<typename RangeT>
@@ -253,8 +253,8 @@ namespace boost {
             struct is_from_rangeF :
                 public predicate_facade< is_from_rangeF<CharT> >
             {
-                // Boost.Lambda support
-                template <class Args> struct sig { typedef bool type; };
+                // Boost.ResultOf support
+                typedef bool result_type;
 
                 // Constructor
                 is_from_rangeF( CharT From, CharT To ) : m_From(From), m_To(To) {}
@@ -278,8 +278,8 @@ namespace boost {
             {
             public:
 
-                // Boost.Lambda support
-                template <class Args> struct sig { typedef bool type; };
+                // Boost.ResultOf support
+                typedef bool result_type;
 
                 // Constructor
                 pred_andF( Pred1T Pred1, Pred2T Pred2 ) :
@@ -303,8 +303,8 @@ namespace boost {
                 public predicate_facade< pred_orF<Pred1T,Pred2T> >
             {
             public:
-                // Boost.Lambda support
-                template <class Args> struct sig { typedef bool type; };
+                // Boost.ResultOf support
+                typedef bool result_type;
 
                 // Constructor
                 pred_orF( Pred1T Pred1, Pred2T Pred2 ) :
@@ -328,8 +328,8 @@ namespace boost {
                 public predicate_facade< pred_notF<PredT> >
             {
             public:
-                // Boost.Lambda support
-                template <class Args> struct sig { typedef bool type; };
+                // Boost.ResultOf support
+                typedef bool result_type;
 
                 // Constructor
                 pred_notF( PredT Pred ) : m_Pred(Pred) {}