diff --git a/xmo-cli.py b/xmo-cli.py
index 031573e..9c5f7ef 100755
--- a/xmo-cli.py
+++ b/xmo-cli.py
@@ -110,7 +110,7 @@ async def set_dns_servers(client: SagemcomClient, dns_servers: tuple[IPv4Address
             break
     else:
         try:
-            await client.set_value_by_xpath(f"Device/DNS/Relay/Enable", True)
+            await client.set_value_by_xpath('Device/DNS/Relay/Enable', True)
         except Exception as e:
             click.echo(e, err=True)