diff --git a/src/libcore/option.rs b/src/libcore/option.rs
index b787de4423aac71b30ff37fe490be3792b92eaf0..2964a6b68534e0f2e0d126ba5c37058c1b03040b 100644
--- a/src/libcore/option.rs
+++ b/src/libcore/option.rs
@@ -143,7 +143,7 @@
 
 #![stable]
 
-use cmp::{PartialEq, Eq, Ord};
+use cmp::{Eq, Ord};
 use default::Default;
 use iter::{Iterator, DoubleEndedIterator, FromIterator, ExactSize};
 use mem;
diff --git a/src/libcore/result.rs b/src/libcore/result.rs
index 2ad5521bb76cd044b332f0e303a71bb1da1cc3df..c4cb2987241533c5cef3bbd4f240bb546c37377e 100644
--- a/src/libcore/result.rs
+++ b/src/libcore/result.rs
@@ -276,7 +276,6 @@
 
 #![stable]
 
-use cmp::PartialEq;
 use std::fmt::Show;
 use slice;
 use slice::AsSlice;
diff --git a/src/libcore/str.rs b/src/libcore/str.rs
index 8937f2a946a85b501b47d0ad4e6bf07c02bc3f4c..10c0f68dd5d8891ce1dc2cf79a91d2aea8ca235a 100644
--- a/src/libcore/str.rs
+++ b/src/libcore/str.rs
@@ -19,8 +19,7 @@
 use mem;
 use char;
 use char::Char;
-use cmp;
-use cmp::{PartialEq, Eq};
+use cmp::{Eq, mod};
 use default::Default;
 use iter::{Map, Iterator};
 use iter::{DoubleEndedIterator, ExactSize};
diff --git a/src/libgetopts/lib.rs b/src/libgetopts/lib.rs
index a8a91283a112800dd5f6c7d0804a6885a790ae0e..d60835dff1745a29c2469a7c9a4c8ef87f9bbdf3 100644
--- a/src/libgetopts/lib.rs
+++ b/src/libgetopts/lib.rs
@@ -93,7 +93,6 @@
 
 #[cfg(test)] #[phase(plugin, link)] extern crate log;
 
-use std::cmp::PartialEq;
 use std::fmt;
 use std::result::{Err, Ok};
 use std::result;