diff --git a/lib/phoenix_component/declarative.ex b/lib/phoenix_component/declarative.ex
index bb4327f71..a64e1945d 100644
--- a/lib/phoenix_component/declarative.ex
+++ b/lib/phoenix_component/declarative.ex
@@ -33,6 +33,7 @@ defmodule Phoenix.Component.Declarative do
     height
     hidden
     id
+    inert
     inputmode
     is
     itemid