diff --git a/watchtower/wtwire/delete_session_reply.go b/watchtower/wtwire/delete_session_reply.go
index 059d189e..e25664a5 100644
--- a/watchtower/wtwire/delete_session_reply.go
+++ b/watchtower/wtwire/delete_session_reply.go
@@ -12,8 +12,6 @@ const (
 	// client side, or that the tower had already deleted the session in a
 	// prior request that the client may not have received.
 	DeleteSessionCodeNotFound DeleteSessionCode = 80
-
-	// TODO(conner): add String method after wtclient is merged
 )
 
 // DeleteSessionReply is a message sent in response to a client's DeleteSession
diff --git a/watchtower/wtwire/error_code.go b/watchtower/wtwire/error_code.go
index 2f4bc6bb..c614f2a6 100644
--- a/watchtower/wtwire/error_code.go
+++ b/watchtower/wtwire/error_code.go
@@ -46,6 +46,8 @@ func (c ErrorCode) String() string {
 		return "StateUpdateCodeMaxUpdatesExceeded"
 	case StateUpdateCodeSeqNumOutOfOrder:
 		return "StateUpdateCodeSeqNumOutOfOrder"
+	case DeleteSessionCodeNotFound:
+		return "DeleteSessionCodeNotFound"
 	default:
 		return fmt.Sprintf("UnknownErrorCode: %d", c)
 	}