diff --git a/src/librustc_mir/dataflow/generic.rs b/src/librustc_mir/dataflow/generic.rs
index 696b44ac2efc..e890b2c66e61 100644
--- a/src/librustc_mir/dataflow/generic.rs
+++ b/src/librustc_mir/dataflow/generic.rs
@@ -1,3 +1,5 @@
+#![allow(unused)]
+
 use std::cmp::Ordering;
 use std::ops;