diff --git a/shape.c b/shape.c
index 766b6bfb23..9cd2c0fe86 100644
--- a/shape.c
+++ b/shape.c
@@ -1219,7 +1219,7 @@ rb_shape_verify_consistency(VALUE obj, shape_id_t shape_id)
 #if SHAPE_DEBUG
 
 /*
- * Exposing Shape to Ruby via RubyVM.debug_shape
+ * Exposing Shape to Ruby via RubyVM::Shape.of(object)
  */
 
 static VALUE