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-rw-r--r--boost/numeric/ublas/traits.hpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/boost/numeric/ublas/traits.hpp b/boost/numeric/ublas/traits.hpp
index 86ae9b50f..ecd52cad8 100644
--- a/boost/numeric/ublas/traits.hpp
+++ b/boost/numeric/ublas/traits.hpp
@@ -20,6 +20,9 @@
#include <boost/numeric/ublas/detail/config.hpp>
#include <boost/numeric/ublas/detail/iterator.hpp>
#include <boost/numeric/ublas/detail/returntype_deduction.hpp>
+#ifdef BOOST_UBLAS_USE_INTERVAL
+#include <boost/numeric/interval.hpp>
+#endif
#include <boost/type_traits.hpp>
#include <complex>