diff --git a/eth/protocol.go b/eth/protocol.go
index f52d935e87..723ab5502e 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