diff --git a/include/boost/lexical_cast.hpp b/include/boost/lexical_cast.hpp
index 094caec..d7d9052 100644
--- a/include/boost/lexical_cast.hpp
+++ b/include/boost/lexical_cast.hpp
@@ -41,9 +41,7 @@
 #include <sstream>
 #endif
 
-#if defined(BOOST_NO_STRINGSTREAM) || \
-    defined(BOOST_NO_STD_WSTRING) || \
-    defined(BOOST_NO_STD_LOCALE) 
+#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
 #define BOOST_LCAST_NO_WCHAR_T
 #endif