diff --git a/xs/xsp/Polygon.xsp b/xs/xsp/Polygon.xsp
index 11fd04360c..93168272b7 100644
--- a/xs/xsp/Polygon.xsp
+++ b/xs/xsp/Polygon.xsp
@@ -2,6 +2,7 @@
 
 %{
 #include <myinit.h>
+#include "BoundingBox.hpp"
 #include "Polygon.hpp"
 %}
 
diff --git a/xs/xsp/Polyline.xsp b/xs/xsp/Polyline.xsp
index 31f1fd222e..e43405df58 100644
--- a/xs/xsp/Polyline.xsp
+++ b/xs/xsp/Polyline.xsp
@@ -2,6 +2,7 @@
 
 %{
 #include <myinit.h>
+#include "BoundingBox.hpp"
 #include "ClipperUtils.hpp"
 #include "Polyline.hpp"
 %}