diff --git a/msgtx.go b/msgtx.go
index a8181e74..48f00678 100644
--- a/msgtx.go
+++ b/msgtx.go
@@ -9,6 +9,9 @@ import (
 	"io"
 )
 
+// TxVersion is the current latest supported transaction version.
+const TxVersion = 1
+
 // MaxTxInSequenceNum is the maximum sequence number the sequence field
 // of a transaction input can be.
 const MaxTxInSequenceNum uint32 = 0xffffffff
diff --git a/protocol.go b/protocol.go
index 1e5c8ede..ebf166fb 100644
--- a/protocol.go
+++ b/protocol.go
@@ -24,8 +24,6 @@ const (
 	// ProtocolVersion is the latest protocol version this package supports.
 	ProtocolVersion uint32 = 70001
 
-	TxVersion = 1
-
 	// MultipleAddressVersion is the protocol version which added multiple
 	// addresses per message (pver >= MultipleAddressVersion).
 	MultipleAddressVersion uint32 = 209