diff --git a/docs/trucs/rmadison.md b/docs/trucs/rmadison.md
index bab2645..89457d4 100644
--- a/docs/trucs/rmadison.md
+++ b/docs/trucs/rmadison.md
@@ -53,6 +53,7 @@ par défaut:
  # qa		"https://qa.debian.org/madison.php",
  # ubuntu	"http://people.canonical.com/~ubuntu-archive/madison.cgi",
  # udd		'https://qa.debian.org/cgi-bin/madison.cgi',
+ # use --url=ubuntu to query ubuntu instead debian 
  #
  # Default architecture to use if none is specified on the command line.
  # use --architecture='*' to run an unrestricted query when