diff --git a/scripts/upgrade b/scripts/upgrade
index ae44949..b09edc5 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -151,7 +151,7 @@ ynh_remove_logrotate
 ynh_script_progression --message="Making sure dedicated system user exists..."
 
 # Create a dedicated user (if not existing)
-ynh_system_user_create --username=$app --home_dir=$final_path
+ynh_system_user_create --username=$app --home_dir="$final_path"
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE