diff --git a/HowtoNginx.md b/HowtoNginx.md
index b6358eb0..75488f8c 100644
--- a/HowtoNginx.md
+++ b/HowtoNginx.md
@@ -382,8 +382,8 @@ if ($http_user_agent ~* (DotBot|Cliqzbot|AhrefsBot|SemrushBot)) {
 Si l'on veut manipuler les headers HTTP, on s'assure d'avoir le paquet `nginx-extras` installé, puis on peut utiliser la directive `more_set_headers`. Exemples :
 
 ~~~
-more_set_headers 'Server: '
-more_set_headers 'Server: My Server v42'
+more_set_headers 'Server: ';
+more_set_headers 'Server: My Server v42';
 ~~~
 
 ### PHP-FPM