diff --git a/chrono/timespan.cpp b/chrono/timespan.cpp
index 87a29e2..5c3ff72 100644
--- a/chrono/timespan.cpp
+++ b/chrono/timespan.cpp
@@ -5,6 +5,7 @@
 #include "../conversion/stringbuilder.h"
 #include "../conversion/stringconversion.h"
 
+#include <array>
 #include <charconv>
 #include <cmath>
 #include <cstdlib>