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-rw-r--r--src/2015/day16/aoc.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/2015/day16/aoc.h b/src/2015/day16/aoc.h
index b51ad61..d3945c6 100644
--- a/src/2015/day16/aoc.h
+++ b/src/2015/day16/aoc.h
@@ -1,5 +1,6 @@
#pragma once
#include "common.h"
+#include <functional>
namespace aoc2015 {
struct sue {