diff --git a/util/reserved.json b/util/reserved.json
index 91ba85d42..cfeee98a3 100644
--- a/util/reserved.json
+++ b/util/reserved.json
@@ -103,6 +103,7 @@
     "private",
     "prod",
     "production",
+    "r",
     "redirect",
     "registrar",
     "registry",