diff --git a/src/checkers.cpp b/src/checkers.cpp
index 499c8db5a..7283bffc4 100644
--- a/src/checkers.cpp
+++ b/src/checkers.cpp
@@ -2,6 +2,7 @@
 #include "ada/unicode-inl.h"
 
 #include <algorithm>
+#include <array>
 
 namespace ada::checkers {