diff --git a/src/librustc_codegen_utils/lib.rs b/src/librustc_codegen_utils/lib.rs
index 96b319481a7f..c3edbb633c72 100644
--- a/src/librustc_codegen_utils/lib.rs
+++ b/src/librustc_codegen_utils/lib.rs
@@ -21,7 +21,6 @@
 #![feature(custom_attribute)]
 #![feature(nll)]
 #![allow(unused_attributes)]
-#![allow(dead_code)]
 #![feature(quote)]
 #![feature(rustc_diagnostic_macros)]