diff --git a/bitcoin/src/p2p/message_blockdata.rs b/bitcoin/src/p2p/message_blockdata.rs
index 44ae0fa68..9c9d3b001 100644
--- a/bitcoin/src/p2p/message_blockdata.rs
+++ b/bitcoin/src/p2p/message_blockdata.rs
@@ -70,7 +70,7 @@ impl Encodable for Inventory {
             Inventory::Transaction(ref t) => encode_inv!(1, t),
             Inventory::Block(ref b) => encode_inv!(2, b),
             Inventory::CompactBlock(ref b) => encode_inv!(4, b),
-            Inventory::WTx(w) => encode_inv!(5, w),
+            Inventory::WTx(ref w) => encode_inv!(5, w),
             Inventory::WitnessTransaction(ref t) => encode_inv!(0x40000001, t),
             Inventory::WitnessBlock(ref b) => encode_inv!(0x40000002, b),
             Inventory::Unknown { inv_type: t, hash: ref d } => encode_inv!(t, d),