1 files changed, 1 insertions, 0 deletions
diff --git a/shape.h b/shape.h
index 28b2ce55f0..43308b833b 100644
--- a/shape.h
+++ b/shape.h
@@ -132,6 +132,7 @@ static inline shape_id_t RCLASS_SHAPE_ID(VALUE obj) {
 
 bool rb_shape_root_shape_p(rb_shape_t* shape);
 rb_shape_t * rb_shape_get_root_shape(void);
+uint8_t rb_shape_id_num_bits(void);
 
 rb_shape_t* rb_shape_get_shape_by_id_without_assertion(shape_id_t shape_id);
 rb_shape_t * rb_shape_get_parent(rb_shape_t * shape);