1 files changed, 1 insertions, 0 deletions
diff --git a/openscad.h b/openscad.h
index b6a3a1d..056f355 100644
--- a/openscad.h
+++ b/openscad.h
@@ -373,6 +373,7 @@ extern void destroy_builtin_modules();
 extern void register_builtin_csgops();
 extern void register_builtin_transform();
 extern void register_builtin_primitives();
+extern void register_builtin_surface();
 extern void register_builtin_control();
 extern void register_builtin_render();
 extern void register_builtin_dxf_linear_extrude();