diff --git a/source/_docs/configuration/customizing-devices.markdown b/source/_docs/configuration/customizing-devices.markdown
index 22215e1dda4..6d88f07afcb 100644
--- a/source/_docs/configuration/customizing-devices.markdown
+++ b/source/_docs/configuration/customizing-devices.markdown
@@ -58,7 +58,7 @@ entity_picture:
   required: false
   type: string
 icon:
-  description: Any icon from [MaterialDesignIcons.com](http://MaterialDesignIcons.com) ([Cheatsheet](https://cdn.materialdesignicons.com/3.5.95/)). Prefix name with `mdi:`, ie `mdi:home`.
+  description: "Any icon from [MaterialDesignIcons.com](http://MaterialDesignIcons.com) ([Cheatsheet](https://cdn.materialdesignicons.com/3.5.95/)). Prefix name with `mdi:`, ie `mdi:home`. Note: Newer icons may not yet be available in the current Home Assistant release. You can check when an icon was added to MaterialDesignIcons.com at [MDI History](https://materialdesignicons.com/history)."
   required: false
   type: string
 assumed_state: