diff --git a/homeassistant/components/roku/strings.json b/homeassistant/components/roku/strings.json
index 818b43930f4..9eef366163e 100644
--- a/homeassistant/components/roku/strings.json
+++ b/homeassistant/components/roku/strings.json
@@ -6,6 +6,9 @@
         "description": "Enter your Roku information.",
         "data": {
           "host": "[%key:common::config_flow::data::host%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of the Roku device to control."
         }
       },
       "discovery_confirm": {