1 files changed, 3 insertions, 2 deletions
diff --git a/src/test/compile-fail/issue-20831-debruijn.rs b/src/test/compile-fail/issue-20831-debruijn.rs
index aaf45f27398..5b623ac377b 100644
--- a/src/test/compile-fail/issue-20831-debruijn.rs
+++ b/src/test/compile-fail/issue-20831-debruijn.rs
@@ -13,10 +13,11 @@
 // below. Note that changing to a named lifetime made the problem go
 // away.
 
-use std::ops::{Shl, Shr};
 use std::cell::RefCell;
+use std::marker::MarkerTrait;
+use std::ops::{Shl, Shr};
 
-pub trait Subscriber {
+pub trait Subscriber : MarkerTrait {
     type Input;
 }