diff --git a/src/libstd/io/mod.rs b/src/libstd/io/mod.rs
index c9db48db9bd4..9cfb1728c04e 100644
--- a/src/libstd/io/mod.rs
+++ b/src/libstd/io/mod.rs
@@ -256,6 +256,7 @@
 //! [`Read::read`]: trait.Read.html#tymethod.read
 //! [`Result`]: ../result/enum.Result.html
 //! [`.unwrap()`]: ../result/enum.Result.html#method.unwrap
+// ignore-tidy-filelength
 
 #![stable(feature = "rust1", since = "1.0.0")]