diff --git a/HowtoMySQL.md b/HowtoMySQL.md
index 79a3afae..f3bcf385 100644
--- a/HowtoMySQL.md
+++ b/HowtoMySQL.md
@@ -853,6 +853,7 @@ Ou à chaud :
 
 ~~~
 SET GLOBAL slow_query_log=ON;
+SET GLOBAL long_query_time=5;
 SET GLOBAL slow_query_log_file= "/var/log/mysql/slow.log";
 ~~~