diff --git a/lib/internal.hpp b/lib/internal.hpp
index 17032e3..5423030 100644
--- a/lib/internal.hpp
+++ b/lib/internal.hpp
@@ -4,6 +4,7 @@
 
 #include <aurora/aurora.h>
 
+#include <array>
 #include <cassert>
 #include <vector>