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-rw-r--r--src/librustc_feature/active.rs3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/librustc_feature/active.rs b/src/librustc_feature/active.rs
index 16d8ada9f24..706e1024365 100644
--- a/src/librustc_feature/active.rs
+++ b/src/librustc_feature/active.rs
@@ -527,6 +527,9 @@ declare_features! (
     /// Allows the use of `#[cfg(sanitize = "option")]`; set when -Zsanitizer is used.
     (active, cfg_sanitize, "1.41.0", Some(39699), None),
 
+    /// Allows using `&mut` in constant functions.
+    (active, const_fn_mut_refs, "1.41.0", None, None),
+
     // -------------------------------------------------------------------------
     // feature-group-end: actual feature gates
     // -------------------------------------------------------------------------