diff --git a/src/libextra/json.rs b/src/libextra/json.rs
index a56d840565f0f8edc6f77da5f2ffa87d456a513e..76dc1d31c49b8153461f9c646b96c70301dde488 100644
--- a/src/libextra/json.rs
+++ b/src/libextra/json.rs
@@ -70,7 +70,7 @@ pub struct TestStruct   {
 
 fn main() {
     let to_encode_object = TestStruct{data_str:~"example of string to encode"};
-    let mut m = io::mem::MemWriter::new();
+    let mut m = io::MemWriter::new();
     {
         let mut encoder = json::Encoder::new(&mut m as &mut std::io::Writer);
         to_encode_object.encode(&mut encoder);