diff --git a/bench_log.rs b/bench_log.rs
index 5ba68ab7..587c1c6a 100644
--- a/bench_log.rs
+++ b/bench_log.rs
@@ -453,11 +453,11 @@ impl Log {
 #[bench]
 fn bench_encoder(b: &mut Bencher) {
     let log = Log::new();
-    let json = serialize::json::Encoder::str_encode(&log);
+    let json = serialize::json::encode(&log);
     let _len = json.len();
 
     b.iter(|| {
-        let _ = serialize::json::Encoder::str_encode(&log);
+        let _ = serialize::json::encode(&log);
     });
 }
 
diff --git a/json.rs b/json.rs
index b71020e4..8553936f 100644
--- a/json.rs
+++ b/json.rs
@@ -3691,7 +3691,7 @@ mod bench {
 
         let mut list = vec!();
         for _ in range(0, count) {
-            list.push(json::Object(box treemap!(
+            list.push(json::Object(treemap!(
                 "a".to_string() => json::Boolean(true),
                 "b".to_string() => json::Null,
                 "c".to_string() => json::Number(3.1415),
@@ -3703,7 +3703,7 @@ mod bench {
                 ))
             )));
         }
-        list.push(json::Object(box TreeMap::new()));
+        list.push(json::Object(TreeMap::new()));
         json::List(list)
     }