diff --git a/src/libcore/to_bytes.rs b/src/libcore/to_bytes.rs
index 3aaa3ab8d91..238b4342a63 100644
--- a/src/libcore/to_bytes.rs
+++ b/src/libcore/to_bytes.rs
@@ -194,19 +194,25 @@ impl<A: IterBytes> &[A]: IterBytes {
 impl<A: IterBytes, B: IterBytes> (A,B): IterBytes {
   #[inline(always)]
   pure fn iter_bytes(lsb0: bool, f: Cb) {
-    let &(ref a, ref b) = &self;
-    a.iter_bytes(lsb0, f);
-    b.iter_bytes(lsb0, f);
+    match self {
+      (ref a, ref b) => {
+        a.iter_bytes(lsb0, f);
+        b.iter_bytes(lsb0, f);
+      }
+    }
   }
 }
 
 impl<A: IterBytes, B: IterBytes, C: IterBytes> (A,B,C): IterBytes {
   #[inline(always)]
   pure fn iter_bytes(lsb0: bool, f: Cb) {
-    let &(ref a, ref b, ref c) = &self;
-    a.iter_bytes(lsb0, f);
-    b.iter_bytes(lsb0, f);
-    c.iter_bytes(lsb0, f);
+    match self {
+      (ref a, ref b, ref c) => {
+        a.iter_bytes(lsb0, f);
+        b.iter_bytes(lsb0, f);
+        c.iter_bytes(lsb0, f);
+      }
+    }
   }
 }