diff --git a/src/maths/rays.h b/src/maths/rays.h
index bf6c7e76..769259f2 100644
--- a/src/maths/rays.h
+++ b/src/maths/rays.h
@@ -5,6 +5,7 @@
 #include "aabb.h"
 #include "glm/glm.hpp"
 
+#include <array>
 #include <unordered_map>
 
 typedef glm::highp_dvec3 rayvec3;