diff --git a/vcg/space/rect_packer.h b/vcg/space/rect_packer.h
index d56bc144..0ae90c00 100644
--- a/vcg/space/rect_packer.h
+++ b/vcg/space/rect_packer.h
@@ -28,6 +28,7 @@
 #include <algorithm>
 #include <vector>
 #include <ctime>
+#include <vcg/space/box2.h>
 #include <vcg/space/point2.h>
 #include <vcg/math/similarity2.h>