diff --git a/library/core/src/intrinsics/mir.rs b/library/core/src/intrinsics/mir.rs
index c6401ec1e33..334e32b26b1 100644
--- a/library/core/src/intrinsics/mir.rs
+++ b/library/core/src/intrinsics/mir.rs
@@ -65,6 +65,7 @@
 //! ```rust
 //! #![feature(core_intrinsics, custom_mir)]
 //! #![allow(internal_features)]
+//! #![allow(unused_assignments)]
 //!
 //! use core::intrinsics::mir::*;
 //!