diff --git a/src/libstd/test.rs b/src/libstd/test.rs
index 7286ce5e2bdf..3f363b613d7d 100644
--- a/src/libstd/test.rs
+++ b/src/libstd/test.rs
@@ -26,7 +26,6 @@ use core::either::Either;
 use core::either;
 use core::io::WriterUtil;
 use core::io;
-use core::libc::size_t;
 use core::comm::{stream, Chan, Port, SharedChan};
 use core::option;
 use core::prelude::*;