diff --git a/src/libstd/comm/mod.rs b/src/libstd/comm/mod.rs
index e25571dd246c83f7e4e4aff0ef63ab4d93fd4b27..267140a0089bdfbbea30a81ecf2d30f605eb9d6f 100644
--- a/src/libstd/comm/mod.rs
+++ b/src/libstd/comm/mod.rs
@@ -291,7 +291,7 @@ pub struct Receiver<T> {
     priv inner: Flavor<T>,
     priv receives: Cell<uint>,
     // can't share in an arc
-    priv marker: marker::NoFreeze,
+    priv marker: marker::NoShare,
 }
 
 /// An iterator over messages on a receiver, this iterator will block
@@ -307,7 +307,7 @@ pub struct Sender<T> {
     priv inner: Flavor<T>,
     priv sends: Cell<uint>,
     // can't share in an arc
-    priv marker: marker::NoFreeze,
+    priv marker: marker::NoShare,
 }
 
 /// This enumeration is the list of the possible reasons that try_recv could not
@@ -340,7 +340,7 @@ pub fn channel<T: Send>() -> (Sender<T>, Receiver<T>) {
 
 impl<T: Send> Sender<T> {
     fn my_new(inner: Flavor<T>) -> Sender<T> {
-        Sender { inner: inner, sends: Cell::new(0), marker: marker::NoFreeze }
+        Sender { inner: inner, sends: Cell::new(0), marker: marker::NoShare }
     }
 
     /// Sends a value along this channel to be received by the corresponding
@@ -478,7 +478,7 @@ fn drop(&mut self) {
 
 impl<T: Send> Receiver<T> {
     fn my_new(inner: Flavor<T>) -> Receiver<T> {
-        Receiver { inner: inner, receives: Cell::new(0), marker: marker::NoFreeze }
+        Receiver { inner: inner, receives: Cell::new(0), marker: marker::NoShare }
     }
 
     /// Blocks waiting for a value on this receiver
diff --git a/src/libstd/comm/select.rs b/src/libstd/comm/select.rs
index 3e134b92493b252786e565816619075fa8558360..5872c308f938bc0bd68e7786164575160e47f1a1 100644
--- a/src/libstd/comm/select.rs
+++ b/src/libstd/comm/select.rs
@@ -66,7 +66,6 @@ pub struct Select {
     priv tail: *mut Handle<'static, ()>,
     priv next_id: Cell<uint>,
     priv marker1: marker::NoSend,
-    priv marker2: marker::NoFreeze,
 }
 
 /// A handle to a receiver which is currently a member of a `Select` set of
@@ -105,7 +104,6 @@ impl Select {
     pub fn new() -> Select {
         Select {
             marker1: marker::NoSend,
-            marker2: marker::NoFreeze,
             head: 0 as *mut Handle<'static, ()>,
             tail: 0 as *mut Handle<'static, ()>,
             next_id: Cell::new(1),