diff --git a/include/boost/functional/hash/detail/hash_float.hpp b/include/boost/functional/hash/detail/hash_float.hpp
index 7e71aa0..b2866f8 100644
--- a/include/boost/functional/hash/detail/hash_float.hpp
+++ b/include/boost/functional/hash/detail/hash_float.hpp
@@ -103,7 +103,8 @@ namespace boost
         template <typename Float>
         inline std::size_t float_hash_impl(Float v,
             BOOST_DEDUCED_TYPENAME boost::enable_if_c<
-                enable_binary_hash<Float, 24, 128>::value, int>::type)
+                enable_binary_hash<Float, 24, 128>::value,
+                std::size_t>::type)
         {
             return hash_binary((char*) &v, 4);
         }
@@ -112,7 +113,8 @@ namespace boost
         template <typename Float>
         inline std::size_t float_hash_impl(Float v,
             BOOST_DEDUCED_TYPENAME boost::enable_if_c<
-                enable_binary_hash<Float, 53, 1024>::value, int>::type)
+                enable_binary_hash<Float, 53, 1024>::value,
+                std::size_t>::type)
         {
             return hash_binary((char*) &v, 8);
         }
@@ -120,7 +122,8 @@ namespace boost
         template <typename Float>
         inline std::size_t float_hash_impl(Float v,
             BOOST_DEDUCED_TYPENAME boost::enable_if_c<
-                enable_binary_hash<Float, 64, 16384>::value, int>::type)
+                enable_binary_hash<Float, 64, 16384>::value,
+                std::size_t>::type)
         {
             return hash_binary((char*) &v, 10);
         }
@@ -128,12 +131,8 @@ namespace boost
         template <typename Float>
         inline std::size_t float_hash_impl(Float v,
             BOOST_DEDUCED_TYPENAME boost::enable_if_c<
-                std::numeric_limits<Float>::is_iec559 &&
-                std::numeric_limits<Float>::digits == 113 &&
-                std::numeric_limits<Float>::radix == 2 &&
-                std::numeric_limits<Float>::max_exponent == 16384,
-                int>::type
-            )
+                enable_binary_hash<Float, 113, 16384>::value,
+                std::size_t>::type)
         {
             return hash_binary((char*) &v, 16);
         }