diff --git a/scripts/install b/scripts/install
index 8525a51..4d93d24 100755
--- a/scripts/install
+++ b/scripts/install
@@ -93,7 +93,7 @@ ynh_setup_source --dest_dir="$install_dir/tools/yunohost" --source_id="yunohostp
 # Add config at the end of wakka.config.php
 ynh_replace_string --match_string=");" --replace_string="  'dataSources' => [\n'yunohost-cli' => [\n'formId' => '5', // form id used in local bazar\n'lang' => 'fr',\n'importer' => 'YunohostCLIApp', // importer class name (without Importer suffix)\n],\n],\n);" --target_file="$install_dir/wakka.config.php"
 SSO_DOMAIN=$(yunohost domain main-domain | sed -e 's/.*: //')
-ynh_replace_string --match_string=");" --replace_string="  'yunohost_sso_domain' => ${SSO_DOMAIN},\n);" --target_file="$install_dir/wakka.config.php"
+ynh_replace_string --match_string=");" --replace_string="  'yunohost_sso_domain' => '${SSO_DOMAIN}',\n);" --target_file="$install_dir/wakka.config.php"
 
 # Ensure that scripts are executable
 chmod +x $install_dir/tools/yunohost/private/scripts/*.sh