diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs
index 4c28655bc865..9d2aa0f21c8e 100644
--- a/src/tools/tidy/src/deps.rs
+++ b/src/tools/tidy/src/deps.rs
@@ -73,6 +73,7 @@ const RESTRICTED_DEPENDENCY_CRATES: &[&str] = &["rustc_driver", "rustc_codegen_l
 const PERMITTED_DEPENDENCIES: &[&str] = &[
     "addr2line",
     "adler",
+    "ahash",
     "aho-corasick",
     "annotate-snippets",
     "ansi_term",