diff --git a/chord/httpnode/client.go b/chord/httpnode/client.go
index 3235f6a..a5f56b1 100644
--- a/chord/httpnode/client.go
+++ b/chord/httpnode/client.go
@@ -80,7 +80,7 @@ func (cl *Client) Notify(ctx context.Context, n *chord.Node, s chord.Peer) error
 		Scheme:   "http",
 		Host:     addr.String(),
 		Path:     path.Join("/", cl.APIBase, "pred"),
-		RawQuery: url.Values{"s": {self.String()}}.Encode(),
+		RawQuery: url.Values{"p": {self.String()}}.Encode(),
 	}
 	req, err := http.NewRequestWithContext(ctx, "POST", url.String(), nil)
 	if err != nil {