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-rw-r--r--boost/regex/v4/regex_workaround.hpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/boost/regex/v4/regex_workaround.hpp b/boost/regex/v4/regex_workaround.hpp
index 821be608c1..f900720bfd 100644
--- a/boost/regex/v4/regex_workaround.hpp
+++ b/boost/regex/v4/regex_workaround.hpp
@@ -33,6 +33,7 @@
#include <algorithm>
#include <iosfwd>
#include <vector>
+#include <set>
#include <map>
#include <boost/limits.hpp>
#include <boost/assert.hpp>