diff --git a/src/network/encodable.rs b/src/network/encodable.rs
index cc278ea..353a2f5 100644
--- a/src/network/encodable.rs
+++ b/src/network/encodable.rs
@@ -37,7 +37,7 @@ use util::hash::Sha256dHash;
 use network::serialize::{SimpleDecoder, SimpleEncoder};
 
 /// Data which can be encoded in a consensus-consistent way
-pub trait ConsensusEncodable<S: SimpleEncoder> : Sized {
+pub trait ConsensusEncodable<S: SimpleEncoder> {
     /// Encode an object with a well-defined format
     fn consensus_encode(&self, e: &mut S) -> Result<(), S::Error>;
 }