diff --git a/src/liballoc/arc.rs b/src/liballoc/arc.rs
index 9481cd4e1a4f1..fc0a3c0fd881a 100644
--- a/src/liballoc/arc.rs
+++ b/src/liballoc/arc.rs
@@ -1328,7 +1328,7 @@ impl<T: ?Sized + fmt::Debug> fmt::Debug for Arc<T> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: ?Sized> fmt::Pointer for Arc<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Pointer::fmt(&self.ptr, f)
+        fmt::Pointer::fmt(&(&**self as *const T), f)
     }
 }
 
diff --git a/src/liballoc/rc.rs b/src/liballoc/rc.rs
index 2f8620cc75051..72b9fa0eb4721 100644
--- a/src/liballoc/rc.rs
+++ b/src/liballoc/rc.rs
@@ -1072,7 +1072,7 @@ impl<T: ?Sized + fmt::Debug> fmt::Debug for Rc<T> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: ?Sized> fmt::Pointer for Rc<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Pointer::fmt(&self.ptr, f)
+        fmt::Pointer::fmt(&(&**self as *const T), f)
     }
 }