diff --git a/HowtoNginx.md b/HowtoNginx.md
index a7d8ebc0..3fa20750 100644
--- a/HowtoNginx.md
+++ b/HowtoNginx.md
@@ -929,3 +929,11 @@ server {
     client_max_body_size 4m;
 }
 ```
+
+### if is evil
+
+Nginx conseille de minimiser l'utilisation de `if` autant que possible :
+
+<https://www.nginx.com/resources/wiki/start/topics/depth/ifisevil/>
+
+