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-rw-r--r--boost/preprocessor/facilities/empty.hpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/boost/preprocessor/facilities/empty.hpp b/boost/preprocessor/facilities/empty.hpp
index 46db19026a..6f215dc511 100644
--- a/boost/preprocessor/facilities/empty.hpp
+++ b/boost/preprocessor/facilities/empty.hpp
@@ -14,6 +14,8 @@
# ifndef BOOST_PREPROCESSOR_FACILITIES_EMPTY_HPP
# define BOOST_PREPROCESSOR_FACILITIES_EMPTY_HPP
#
+# include <boost/preprocessor/config/config.hpp>
+#
# /* BOOST_PP_EMPTY */
#
# define BOOST_PP_EMPTY()