diff --git a/xs/xsp/Line.xsp b/xs/xsp/Line.xsp
index 7d234729f..a1927d57c 100644
--- a/xs/xsp/Line.xsp
+++ b/xs/xsp/Line.xsp
@@ -3,6 +3,7 @@
 %{
 #include <myinit.h>
 #include "Line.hpp"
+#include "Polyline.hpp"
 #include "perlglue.hpp"
 %}