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-rw-r--r--src/system.hh.in4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/system.hh.in b/src/system.hh.in
index b0b8f1eb..12f257eb 100644
--- a/src/system.hh.in
+++ b/src/system.hh.in
@@ -164,7 +164,11 @@ typedef std::ostream::pos_type ostream_pos_type;
#include <boost/random/uniform_int.hpp>
#include <boost/random/uniform_real.hpp>
#include <boost/random/variate_generator.hpp>
+#if defined(HAVE_BOOST_REGEX_UNICODE)
+#include <boost/regex/icu.hpp>
+#else
#include <boost/regex.hpp>
+#endif // HAVE_BOOST_REGEX_UNICODE
#include <boost/variant.hpp>
#include <boost/version.hpp>