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-rw-r--r--decoder/scfg_translator.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/decoder/scfg_translator.cc b/decoder/scfg_translator.cc
index c3cfcaad..83b65c28 100644
--- a/decoder/scfg_translator.cc
+++ b/decoder/scfg_translator.cc
@@ -1,5 +1,6 @@
#include <algorithm>
#include <vector>
+#include <unordered_set>
#include <boost/foreach.hpp>
#include <boost/functional/hash.hpp>
#include "fast_lexical_cast.hpp"