diff --git a/ledbat.cpp b/ledbat.cpp
index 5f7c5d5..2828ea0 100644
--- a/ledbat.cpp
+++ b/ledbat.cpp
@@ -5,6 +5,7 @@
 #include <cmath>
 #include <deque>
 #include <cstdint>
+#include <tuple>
 #include <cassert>
 
 #include <iomanip>