diff --git a/book/src/lint_configuration.md b/book/src/lint_configuration.md
index 1db2ad585..9acacede5 100644
--- a/book/src/lint_configuration.md
+++ b/book/src/lint_configuration.md
@@ -517,7 +517,7 @@ for the generic parameters for determining interior mutability
 
 **Default Value:** `["bytes::Bytes"]` (`Vec<String>`)
 
-* [mutable_key](https://rust-lang.github.io/rust-clippy/master/index.html#mutable_key)
+* [mutable_key_type](https://rust-lang.github.io/rust-clippy/master/index.html#mutable_key_type)
 
 
 ### allow-mixed-uninlined-format-args
diff --git a/clippy_lints/src/utils/conf.rs b/clippy_lints/src/utils/conf.rs
index 5bdffab26..4dfe23f47 100644
--- a/clippy_lints/src/utils/conf.rs
+++ b/clippy_lints/src/utils/conf.rs
@@ -437,7 +437,7 @@ define_Conf! {
     ///
     /// The maximum size of the `Err`-variant in a `Result` returned from a function
     (large_error_threshold: u64 = 128),
-    /// Lint: MUTABLE_KEY.
+    /// Lint: MUTABLE_KEY_TYPE.
     ///
     /// A list of paths to types that should be treated like `Arc`, i.e. ignored but
     /// for the generic parameters for determining interior mutability