diff --git a/homeassistant/components/modern_forms/strings.json b/homeassistant/components/modern_forms/strings.json
index dd47ef721af3..e6d0f6a2206e 100644
--- a/homeassistant/components/modern_forms/strings.json
+++ b/homeassistant/components/modern_forms/strings.json
@@ -6,6 +6,9 @@
         "description": "Set up your Modern Forms fan to integrate with Home Assistant.",
         "data": {
           "host": "[%key:common::config_flow::data::host%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of your Modern Forms fan."
         }
       },
       "zeroconf_confirm": {
diff --git a/homeassistant/components/moehlenhoff_alpha2/strings.json b/homeassistant/components/moehlenhoff_alpha2/strings.json
index 3347b2f318c1..d15ec9f89ebb 100644
--- a/homeassistant/components/moehlenhoff_alpha2/strings.json
+++ b/homeassistant/components/moehlenhoff_alpha2/strings.json
@@ -5,6 +5,9 @@
       "user": {
         "data": {
           "host": "[%key:common::config_flow::data::host%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of your Möhlenhoff Alpha2 system."
         }
       }
     },
diff --git a/homeassistant/components/mutesync/strings.json b/homeassistant/components/mutesync/strings.json
index 2a3cca666ee5..b08263848997 100644
--- a/homeassistant/components/mutesync/strings.json
+++ b/homeassistant/components/mutesync/strings.json
@@ -4,6 +4,9 @@
       "user": {
         "data": {
           "host": "[%key:common::config_flow::data::host%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of your mutesync device."
         }
       }
     },
diff --git a/homeassistant/components/mystrom/strings.json b/homeassistant/components/mystrom/strings.json
index a485a58f5a66..9ebd1c36df00 100644
--- a/homeassistant/components/mystrom/strings.json
+++ b/homeassistant/components/mystrom/strings.json
@@ -5,6 +5,9 @@
         "data": {
           "name": "[%key:common::config_flow::data::name%]",
           "host": "[%key:common::config_flow::data::host%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of your myStrom device."
         }
       }
     },