diff --git a/src/libcore/str.rs b/src/libcore/str.rs
index a2124880ea3..456e28c6ad8 100644
--- a/src/libcore/str.rs
+++ b/src/libcore/str.rs
@@ -38,8 +38,8 @@ export
    chars,
    substr,
    char_slice,
-   slice,
-   safe_slice,
+   //slice,
+   //safe_slice,
    split,
    splitn,
    split_str,