diff --git a/include/boost/config/compiler/clang_version.hpp b/include/boost/config/compiler/clang_version.hpp
index e85ed4392..3a3629596 100644
--- a/include/boost/config/compiler/clang_version.hpp
+++ b/include/boost/config/compiler/clang_version.hpp
@@ -11,7 +11,10 @@
 
 // https://en.wikipedia.org/wiki/Xcode#Toolchain_versions
 
-# if BOOST_CLANG_REPORTED_VERSION >= 160000
+# if BOOST_CLANG_REPORTED_VERSION >= 170000
+#   define BOOST_CLANG_VERSION 190104
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 160000
 #   define BOOST_CLANG_VERSION 170006
 
 # elif BOOST_CLANG_REPORTED_VERSION >= 150000