diff --git a/object.c b/object.c
index 2fff5d529c..5ecc035302 100644
--- a/object.c
+++ b/object.c
@@ -3470,7 +3470,7 @@ rb_check_to_float(VALUE val)
     if (!rb_obj_is_kind_of(val, rb_cNumeric)) {
 	return Qnil;
     }
-    return rb_check_convert_type(val, T_FLOAT, "Float", "to_f");
+    return rb_check_convert_type_with_id(val, T_FLOAT, "Float", id_to_f);
 }
 
 static inline int