From 70afe41fd39fc173480ef8c1ec188f5e6b4f6fdb Mon Sep 17 00:00:00 2001
From: Colin LeMahieu <clemahieu@gmail.com>
Date: Tue, 29 Oct 2024 04:40:21 +0000
Subject: [PATCH] Include missing optional header.

---
 nano/lib/blocks.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/nano/lib/blocks.hpp b/nano/lib/blocks.hpp
index 0c780c9a4..d16d0ca40 100644
--- a/nano/lib/blocks.hpp
+++ b/nano/lib/blocks.hpp
@@ -9,6 +9,8 @@
 
 #include <boost/property_tree/ptree_fwd.hpp>
 
+#include <optional>
+
 typedef struct blake2b_state__ blake2b_state;
 
 namespace nano