diff --git a/include/boost/preprocessor/variadic/has_opt.hpp b/include/boost/preprocessor/variadic/has_opt.hpp
index 7054e945..bb40e378 100644
--- a/include/boost/preprocessor/variadic/has_opt.hpp
+++ b/include/boost/preprocessor/variadic/has_opt.hpp
@@ -19,6 +19,8 @@
 # if defined(__cplusplus) && __cplusplus > 201703L
 #  if defined(__GNUC__) && !defined(__clang__) && __GNUC__ >= 8 && __GNUC__ < 10
 #   define BOOST_PP_VARIADIC_HAS_OPT() 0
+#  elif defined(__clang__) && __clang_major__ < 9
+#   define BOOST_PP_VARIADIC_HAS_OPT() 0
 #  else
 #   include <boost/preprocessor/variadic/detail/has_opt.hpp>
 #   define BOOST_PP_VARIADIC_HAS_OPT() \