diff --git a/src/libcore/iter/adapters/mod.rs b/src/libcore/iter/adapters/mod.rs
index fdb98bcc2e657..96105d83df265 100644
--- a/src/libcore/iter/adapters/mod.rs
+++ b/src/libcore/iter/adapters/mod.rs
@@ -1,3 +1,4 @@
+// ignore-tidy-filelength
 use crate::cmp;
 use crate::fmt;
 use crate::intrinsics;