diff --git a/include/boost/throw_exception.hpp b/include/boost/throw_exception.hpp
index 54aab7b..656b8de 100644
--- a/include/boost/throw_exception.hpp
+++ b/include/boost/throw_exception.hpp
@@ -39,7 +39,7 @@
 # define BOOST_THROW_EXCEPTION(x) ::boost::throw_exception(::boost::enable_error_info(x) <<\
     ::boost::throw_function(BOOST_CURRENT_FUNCTION) <<\
     ::boost::throw_file(__FILE__) <<\
-    ::boost::throw_line((int)__LINE__))
+    ::boost::throw_line(__LINE__))
 #else
 # define BOOST_THROW_EXCEPTION(x) ::boost::throw_exception(x)
 #endif