1 files changed, 0 insertions, 4 deletions
diff --git a/compiler/rustc_error_codes/src/error_codes/E0764.md b/compiler/rustc_error_codes/src/error_codes/E0764.md
index 152627cf654..4d5091cd954 100644
--- a/compiler/rustc_error_codes/src/error_codes/E0764.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0764.md
@@ -3,8 +3,6 @@ A mutable reference was used in a constant.
 Erroneous code example:
 
 ```compile_fail,E0764
-#![feature(const_mut_refs)]
-
 fn main() {
     const OH_NO: &'static mut usize = &mut 1; // error!
 }
@@ -26,8 +24,6 @@ Remember: you cannot use a function call inside a constant or static. However,
 you can totally use it in constant functions:
 
 ```
-#![feature(const_mut_refs)]
-
 const fn foo(x: usize) -> usize {
     let mut y = 1;
     let z = &mut y;