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-rw-r--r--training/utils/candidate_set.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/training/utils/candidate_set.cc b/training/utils/candidate_set.cc
index 1dec9609..33dae9a3 100644
--- a/training/utils/candidate_set.cc
+++ b/training/utils/candidate_set.cc
@@ -1,6 +1,6 @@
#include "candidate_set.h"
-#ifdef HAVE_CXX11
+#ifndef HAVE_OLD_CPP
# include <unordered_set>
#else
# include <tr1/unordered_set>