diff --git a/content/os/v1.x/en/installation/configuration/write-files/_index.md b/content/os/v1.x/en/installation/configuration/write-files/_index.md
index bc86e0a21ab..c222448370c 100644
--- a/content/os/v1.x/en/installation/configuration/write-files/_index.md
+++ b/content/os/v1.x/en/installation/configuration/write-files/_index.md
@@ -39,3 +39,5 @@ write_files:
       restrict 127.0.0.1
       restrict [::1]
 ```
+
+> **Note:** Currently, writing files to a specific system service is only supported for RancherOS's built-in services. You are unable to write files to any custom system services.