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-rw-r--r--boost/serialization/assume_abstract.hpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/boost/serialization/assume_abstract.hpp b/boost/serialization/assume_abstract.hpp
index a5cb2f55a4..632f9312f5 100644
--- a/boost/serialization/assume_abstract.hpp
+++ b/boost/serialization/assume_abstract.hpp
@@ -19,6 +19,7 @@
// this is useful for compilers which don't support the boost::is_abstract
#include <boost/type_traits/is_abstract.hpp>
+#include <boost/mpl/bool_fwd.hpp>
#ifndef BOOST_NO_IS_ABSTRACT