diff --git a/include/boost/functional/detail/hash_float.hpp b/include/boost/functional/detail/hash_float.hpp
index 62ded55..b85d15f 100644
--- a/include/boost/functional/detail/hash_float.hpp
+++ b/include/boost/functional/detail/hash_float.hpp
@@ -17,7 +17,6 @@
 #include <boost/functional/detail/float_functions.hpp>
 #include <boost/limits.hpp>
 #include <boost/assert.hpp>
-#include <errno.h>
 
 // Don't use fpclassify or _fpclass for stlport.
 #if !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
@@ -48,9 +47,7 @@ namespace boost
         inline std::size_t float_hash_impl(T v)
         {
             int exp = 0;
-            errno = 0;
             v = boost::hash_detail::call_frexp(v, &exp);
-            if(errno) return 0;
 
             std::size_t seed = 0;