diff --git a/EGkBBox3d.h b/EGkBBox3d.h
index 125c4fa..f117b41 100644
--- a/EGkBBox3d.h
+++ b/EGkBBox3d.h
@@ -15,6 +15,7 @@
 #pragma once
 
 #include "/EgtDev/Include/EGkPoint3d.h"
+#include "/EgtDev/Include/EGkFrame3d.h"
 #include <vector>
 
 //----------------------- Macro per import/export ----------------------------