diff --git a/src/pages/guide/themes/favicon.md b/src/pages/guide/themes/favicon.md
index 15ec99da..430cb805 100644
--- a/src/pages/guide/themes/favicon.md
+++ b/src/pages/guide/themes/favicon.md
@@ -40,6 +40,10 @@ To add a custom favicon in the Admin, do the following:
 
 If caching is enabled in your Admin, you get a notification that refreshing certain cache types is required. Click the link provided in the notification, and then click **Flush Magento Cache**. You can also navigate to **System** > Tools > **Cache Management** and click **Flush Magento Cache**, or run `bin/magento cache:flush`.
 
+<InlineAlert variant="info" slots="text"/>
+
+A custom `.ico` favicon can only be uploaded if **Stores** > **Configuration** > **Advanced** > **Developer** > **Image Processing Settings** is configured to use ImageMagick.
+
 ## Add custom favicons manually
 
 To override the default 16px x 16px favicon manually, add your custom `favicon.ico` in the `<your_theme_dir>/Magento_Theme/web/`directory.