1 files changed, 1 insertions, 1 deletions
diff --git a/src/libcore/sys.rs b/src/libcore/sys.rs
index 0173620dc51..8cad0a22886 100644
--- a/src/libcore/sys.rs
+++ b/src/libcore/sys.rs
@@ -154,7 +154,7 @@ pub fn pref_align_of_val<T>(_val: &T) -> uint {
 #[inline(always)]
 pub fn refcount<T>(t: @T) -> uint {
     unsafe {
-        let ref_ptr: *uint = cast::transmute(t);
+        let ref_ptr: *uint = cast::transmute_copy(&t);
         *ref_ptr - 1
     }
 }