diff --git a/doc/installation.rst b/doc/installation.rst
index 3e67fd1b8..bb65e5a3d 100644
--- a/doc/installation.rst
+++ b/doc/installation.rst
@@ -24,7 +24,7 @@ To use it, just run the following commands in your terminal:
 
   > git clone https://github.com/modoboa/modoboa-installer
   > cd modoboa-installer
-  > sudo ./run.py <mail server hostname>
+  > sudo ./run.py <your domain>
 
 Wait a few minutes and you're done \o/