1 files changed, 1 insertions, 1 deletions
diff --git a/shape.h b/shape.h
index 025dfb4dd8..5689b48067 100644
--- a/shape.h
+++ b/shape.h
@@ -152,7 +152,7 @@ rb_shape_t* rb_shape_get_shape(VALUE obj);
 int rb_shape_frozen_shape_p(rb_shape_t* shape);
 void rb_shape_transition_shape_frozen(VALUE obj);
 void rb_shape_transition_shape_remove_ivar(VALUE obj, ID id, rb_shape_t *shape, VALUE * removed);
-rb_shape_t * rb_shape_transition_shape_capa(rb_shape_t * shape, uint32_t new_capacity);
+rb_shape_t * rb_shape_transition_shape_capa(rb_shape_t * shape);
 rb_shape_t* rb_shape_get_next(rb_shape_t* shape, VALUE obj, ID id);
 
 rb_shape_t * rb_shape_rebuild_shape(rb_shape_t * initial_shape, rb_shape_t * dest_shape);