diff --git a/compiler/rustc_middle/src/mir/mod.rs b/compiler/rustc_middle/src/mir/mod.rs
index 672686410f9..ed813c054c2 100644
--- a/compiler/rustc_middle/src/mir/mod.rs
+++ b/compiler/rustc_middle/src/mir/mod.rs
@@ -651,7 +651,7 @@ pub enum BorrowKind {
     /// in an aliasable location. To solve, you'd have to translate with
     /// an `&mut` borrow:
     ///
-    ///     struct Env { x: & &mut isize }
+    ///     struct Env { x: &mut &mut isize }
     ///     let x: &mut isize = ...;
     ///     let y = (&mut Env { &mut x }, fn_ptr); // changed from &x to &mut x
     ///     fn fn_ptr(env: &mut Env) { **env.x += 5; }
diff --git a/compiler/rustc_middle/src/ty/closure.rs b/compiler/rustc_middle/src/ty/closure.rs
index 0706a057dd0..b0156daf17e 100644
--- a/compiler/rustc_middle/src/ty/closure.rs
+++ b/compiler/rustc_middle/src/ty/closure.rs
@@ -347,7 +347,7 @@ pub enum BorrowKind {
     /// an `&mut` borrow:
     ///
     /// ```
-    /// struct Env { x: & &mut isize }
+    /// struct Env { x: &mut &mut isize }
     /// let x: &mut isize = ...;
     /// let y = (&mut Env { &mut x }, fn_ptr); // changed from &x to &mut x
     /// fn fn_ptr(env: &mut Env) { **env.x += 5; }