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-rw-r--r--src/system.hh1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/system.hh b/src/system.hh
index 96b574e5..080d187f 100644
--- a/src/system.hh
+++ b/src/system.hh
@@ -78,6 +78,7 @@
#include <map>
#include <memory>
#include <new>
+#include <set>
#include <stack>
#include <string>
#include <vector>