diff --git a/src/helpers/Region.hpp b/src/helpers/Region.hpp
index 94b639c9..80153cff 100644
--- a/src/helpers/Region.hpp
+++ b/src/helpers/Region.hpp
@@ -2,6 +2,7 @@
 #include <pixman.h>
 #include <vector>
 #include "Vector2D.hpp"
+#include "Box.hpp"
 
 struct wlr_box;