diff --git a/service/meta.go b/service/meta.go
index 1e3fcc8..6b5b8b7 100644
--- a/service/meta.go
+++ b/service/meta.go
@@ -56,6 +56,9 @@ const (
 	ErrIncorrectTTL = internal.Error("incorrect ttl")
 )
 
+// SetVersion sets protocol version to RequestMetaHeader.
+func (m *RequestMetaHeader) SetVersion(v uint32) { m.Version = v }
+
 // SetTTL sets TTL to RequestMetaHeader.
 func (m *RequestMetaHeader) SetTTL(v uint32) { m.TTL = v }