--- a/src/uint256.h	2022-07-20 10:07:39.191319302 +0000
+++ b/src/uint256.h	2022-07-20 10:07:11.809632293 +0000
@@ -7,6 +7,7 @@
 #ifndef BITCOIN_UINT256_H
 #define BITCOIN_UINT256_H

+#include <array>
 #include <assert.h>
 #include <cstring>
 #include <stdexcept>