--- src/ssl/tls_record.h.orig	2017-10-01 23:00:00.000000000 -0700
+++ src/ssl/tls_record.h	2017-12-27 09:35:29.000000000 -0700
@@ -20,7 +20,7 @@
 #if defined(BOTAN_BUILD_COMPILER_IS_MSVC)
     #include <functional>
 #else
-    #include <tr1/functional>
+    #include <functional>
 #endif
 
 #elif defined(BOTAN_USE_BOOST_TR1)