diff --git a/scripts/install b/scripts/install
index 89f3206..103fd14 100755
--- a/scripts/install
+++ b/scripts/install
@@ -76,6 +76,7 @@ then
     ynh_script_progression --message="Creating a MySQL database..." --weight=2
 
     db_name=$(ynh_sanitize_dbid --db_name=$app)
+    db_user=$db_name
     ynh_app_setting_set --app=$app --key=db_name --value=$db_name
     ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name
 fi