diff --git a/clippy_utils/src/ty/mod.rs b/clippy_utils/src/ty/mod.rs
index a90d64e972c1..53ad6675ab07 100644
--- a/clippy_utils/src/ty/mod.rs
+++ b/clippy_utils/src/ty/mod.rs
@@ -29,7 +29,10 @@ use rustc_span::{DUMMY_SP, Span, Symbol, sym};
 use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt as _;
 use rustc_trait_selection::traits::query::normalize::QueryNormalizeExt;
 use rustc_trait_selection::traits::{Obligation, ObligationCause};
+#[cfg(bootstrap)]
 use std::assert_matches::debug_assert_matches;
+#[cfg(not(bootstrap))]
+use std::debug_assert_matches;
 use std::collections::hash_map::Entry;
 use std::{iter, mem};