diff --git a/src/session_impl.cpp b/src/session_impl.cpp
index 90bee7188..4233f38eb 100644
--- a/src/session_impl.cpp
+++ b/src/session_impl.cpp
@@ -46,7 +46,6 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #include "libtorrent/aux_/disable_warnings_push.hpp"
 
-#include <boost/limits.hpp>
 #include <boost/function_equal.hpp>
 #include <boost/make_shared.hpp>
 #include <boost/asio/ip/v6_only.hpp>
@@ -276,7 +275,7 @@ namespace aux {
 			return SSL_TLSEXT_ERR_ALERT_FATAL;
 
 		sha1_hash info_hash;
-		bool valid = from_hex(servername, 40, info_hash.data());
+		bool valid = aux::from_hex({servername, 40}, info_hash.data());
 
 		// the server name is not a valid hex-encoded info-hash
 		if (!valid)