diff --git a/include/boost/intrusive/detail/preprocessor.hpp b/include/boost/intrusive/detail/preprocessor.hpp
index b8143a4..0326dc2 100644
--- a/include/boost/intrusive/detail/preprocessor.hpp
+++ b/include/boost/intrusive/detail/preprocessor.hpp
@@ -27,8 +27,6 @@
 #include <boost/preprocessor/repetition/enum_params.hpp>
 #include <boost/preprocessor/repetition/enum_trailing_params.hpp>
 #include <boost/preprocessor/repetition/enum_trailing.hpp>
-#include <boost/preprocessor/repetition/enum_shifted_params.hpp>
-#include <boost/preprocessor/repetition/enum_shifted.hpp>
 #include <boost/preprocessor/repetition/repeat.hpp>
 #include <boost/preprocessor/logical/not.hpp>
 #include <boost/preprocessor/arithmetic/sub.hpp>