diff --git a/clippy_lints/src/needless_pass_by_ref_mut.rs b/clippy_lints/src/needless_pass_by_ref_mut.rs
index c5dc87cdfa8..d535963a1dc 100644
--- a/clippy_lints/src/needless_pass_by_ref_mut.rs
+++ b/clippy_lints/src/needless_pass_by_ref_mut.rs
@@ -22,6 +22,9 @@ declare_clippy_lint! {
     /// ### What it does
     /// Check if a `&mut` function argument is actually used mutably.
     ///
+    /// Be careful if the function is publically reexported as it would break compatibility with
+    /// users of this function.
+    ///
     /// ### Why is this bad?
     /// Less `mut` means less fights with the borrow checker. It can also lead to more
     /// opportunities for parallelization.