diff --git a/src/libstd/cell.rs b/src/libstd/cell.rs
index 398091b60cae3..3276bbbcbb625 100644
--- a/src/libstd/cell.rs
+++ b/src/libstd/cell.rs
@@ -23,6 +23,7 @@ pub struct Cell<T> {
     priv value: T,
     priv marker1: marker::InvariantType<T>,
     priv marker2: marker::NoFreeze,
+    priv marker3: marker::NoShare,
 }
 
 impl<T:Pod> Cell<T> {
@@ -32,6 +33,7 @@ impl<T:Pod> Cell<T> {
             value: value,
             marker1: marker::InvariantType::<T>,
             marker2: marker::NoFreeze,
+            marker3: marker::NoShare,
         }
     }
 
@@ -75,6 +77,7 @@ pub struct RefCell<T> {
     priv marker1: marker::InvariantType<T>,
     priv marker2: marker::NoFreeze,
     priv marker3: marker::NoPod,
+    priv marker4: marker::NoShare,
 }
 
 // Values [1, MAX-1] represent the number of `Ref` active
@@ -90,6 +93,7 @@ impl<T> RefCell<T> {
             marker1: marker::InvariantType::<T>,
             marker2: marker::NoFreeze,
             marker3: marker::NoPod,
+            marker4: marker::NoShare,
             value: value,
             borrow: UNUSED,
         }
diff --git a/src/libstd/rc.rs b/src/libstd/rc.rs
index 5c4b19b4e4b8c..605cbd3f28a12 100644
--- a/src/libstd/rc.rs
+++ b/src/libstd/rc.rs
@@ -42,7 +42,8 @@ struct RcBox<T> {
 #[unsafe_no_drop_flag]
 pub struct Rc<T> {
     priv ptr: *mut RcBox<T>,
-    priv marker: marker::NoSend
+    priv nosend: marker::NoSend,
+    priv noshare: marker::NoShare
 }
 
 impl<T> Rc<T> {
@@ -56,7 +57,8 @@ impl<T> Rc<T> {
                 // strong destructor is running, even if the weak
                 // pointer is stored inside the strong one.
                 ptr: transmute(~RcBox { value: value, strong: 1, weak: 1 }),
-                marker: marker::NoSend,
+                nosend: marker::NoSend,
+                noshare: marker::NoShare
             }
         }
     }
@@ -67,7 +69,11 @@ impl<T> Rc<T> {
     pub fn downgrade(&self) -> Weak<T> {
         unsafe {
             (*self.ptr).weak += 1;
-            Weak { ptr: self.ptr, marker: marker::NoSend }
+            Weak {
+                ptr: self.ptr,
+                nosend: marker::NoSend,
+                noshare: marker::NoShare
+            }
         }
     }
 }
@@ -107,7 +113,7 @@ impl<T> Clone for Rc<T> {
     fn clone(&self) -> Rc<T> {
         unsafe {
             (*self.ptr).strong += 1;
-            Rc { ptr: self.ptr, marker: marker::NoSend }
+            Rc { ptr: self.ptr, nosend: marker::NoSend, noshare: marker::NoShare }
         }
     }
 }
@@ -138,7 +144,8 @@ impl<T: Ord> Ord for Rc<T> {
 #[unsafe_no_drop_flag]
 pub struct Weak<T> {
     priv ptr: *mut RcBox<T>,
-    priv marker: marker::NoSend
+    priv nosend: marker::NoSend,
+    priv noshare: marker::NoShare
 }
 
 impl<T> Weak<T> {
@@ -149,7 +156,7 @@ impl<T> Weak<T> {
                 None
             } else {
                 (*self.ptr).strong += 1;
-                Some(Rc { ptr: self.ptr, marker: marker::NoSend })
+                Some(Rc { ptr: self.ptr, nosend: marker::NoSend, noshare: marker::NoShare })
             }
         }
     }
@@ -176,7 +183,7 @@ impl<T> Clone for Weak<T> {
     fn clone(&self) -> Weak<T> {
         unsafe {
             (*self.ptr).weak += 1;
-            Weak { ptr: self.ptr, marker: marker::NoSend }
+            Weak { ptr: self.ptr, nosend: marker::NoSend, noshare: marker::NoShare }
         }
     }
 }