diff --git a/eth/protocol.go b/eth/protocol.go
index f52d935e873f4726caa39786faa2b5150c6b9551..723ab5502e4c8f13dd92c8ff47cb7788acddcb26 100644
--- a/eth/protocol.go
+++ b/eth/protocol.go
@@ -22,6 +22,7 @@ const (
 // eth protocol message codes
 const (
 	StatusMsg = iota
+	GetTxMsg  // unused
 	TxMsg
 	GetBlockHashesMsg
 	BlockHashesMsg