diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs
index 8e46ca6cd299..cc56e3b96d95 100644
--- a/src/tools/tidy/src/deps.rs
+++ b/src/tools/tidy/src/deps.rs
@@ -52,6 +52,7 @@ const EXCEPTIONS: &[&str] = &[
     "constant_time_eq",   // CC0-1.0, rustfmt
     "utf8parse",          // Apache-2.0 OR MIT, cargo via strip-ansi-escapes
     "vte",                // Apache-2.0 OR MIT, cargo via strip-ansi-escapes
+    "hermit-abi",         // Apache-2.0 OR MIT
     "sized-chunks",       // MPL-2.0+, cargo via im-rc
     // FIXME: this dependency violates the documentation comment above:
     "fortanix-sgx-abi",   // MPL-2.0+, libstd but only for `sgx` target