diff --git a/xs/src/Extruder.cpp b/xs/src/Extruder.cpp
index 8194f7149..3dce80ea7 100644
--- a/xs/src/Extruder.cpp
+++ b/xs/src/Extruder.cpp
@@ -1,4 +1,7 @@
 #include "Extruder.hpp"
+#ifdef SLIC3RXS
+#include "perlglue.hpp"
+#endif
 
 namespace Slic3r {
 
@@ -39,4 +42,8 @@ Extruder::use_relative_e_distances() const
     return *static_cast<const ConfigOptionBool*>(opt);
 }
 
+#ifdef SLIC3RXS
+REGISTER_CLASS(Extruder, "Extruder");
+#endif
+
 }