diff --git a/serde_codegen/src/lib.rs b/serde_codegen/src/lib.rs
index 371cd841..701f0d53 100644
--- a/serde_codegen/src/lib.rs
+++ b/serde_codegen/src/lib.rs
@@ -194,7 +194,7 @@ pub fn expand_single_item(item: &str) -> Result<String, String> {
     let expanded_de = if de {
         Some(try!(de::expand_derive_deserialize(&syn_item)))
     } else {
-        None::<quote::Tokens>
+        None
     };
     let syn_item = post_expansion::strip_attrs_later(syn_item, &["serde"], "serde");
     return Ok(quote!(#expanded_ser #expanded_de #syn_item).to_string());