diff --git a/tests/t00012/t00012.cc b/tests/t00012/t00012.cc
index c2a79d73..82f292a0 100644
--- a/tests/t00012/t00012.cc
+++ b/tests/t00012/t00012.cc
@@ -1,6 +1,6 @@
 #include <algorithm>
+#include <array>
 #include <map>
-#include <numeric>
 #include <string>
 #include <variant>
 #include <vector>