diff --git a/include/boost/lexical_cast/detail/converter_lexical_streams.hpp b/include/boost/lexical_cast/detail/converter_lexical_streams.hpp
index 158edac..17c6cf9 100644
--- a/include/boost/lexical_cast/detail/converter_lexical_streams.hpp
+++ b/include/boost/lexical_cast/detail/converter_lexical_streams.hpp
@@ -282,7 +282,7 @@ namespace boost {
 #if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
                     sprintf_s(begin, CharacterBufferSize,
 #else
-                    snprintf(begin, CharacterBufferSize,
+                    sprintf(begin,
 #endif
                     "%.*g", static_cast<int>(boost::detail::lcast_get_precision<float>()), val_as_double);
                 return finish > start;
@@ -294,7 +294,7 @@ namespace boost {
 #if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
                     sprintf_s(begin, CharacterBufferSize,
 #else
-                    snprintf(begin, CharacterBufferSize,
+                    sprintf(begin,
 #endif
                     "%.*g", static_cast<int>(boost::detail::lcast_get_precision<double>()), val);
                 return finish > start;
@@ -307,7 +307,7 @@ namespace boost {
 #if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
                     sprintf_s(begin, CharacterBufferSize,
 #else
-                    snprintf(begin, CharacterBufferSize,
+                    sprintf(begin,
 #endif
                     "%.*Lg", static_cast<int>(boost::detail::lcast_get_precision<long double>()), val );
                 return finish > start;