diff --git a/scripts/install b/scripts/install
index 0d6cedc..71de790 100644
--- a/scripts/install
+++ b/scripts/install
@@ -144,7 +144,7 @@ ynh_add_nginx_config
 #=================================================
 
 # Create a system user
-ynh_system_user_create $app $final_path
+ynh_system_user_create "$app" "$final_path"
 
 #=================================================
 # PHP-FPM CONFIGURATION
diff --git a/scripts/restore b/scripts/restore
index e8e6168..1b0b634 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -67,7 +67,7 @@ ynh_restore_file "$final_path"
 #=================================================
 
 # Create the dedicated user (if not existing)
-ynh_system_user_create $app $final_path
+ynh_system_user_create "$app" "$final_path"
 
 #=================================================
 # RESTORE USER RIGHTS
diff --git a/scripts/upgrade b/scripts/upgrade
index 9d3e9bf..2b6606f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -101,7 +101,7 @@ ynh_install_nodejs 8
 #=================================================
 
 # Create a dedicated user (if not existing)
-ynh_system_user_create $app $final_path
+ynh_system_user_create "$app" "$final_path"
 
 #=================================================
 # PHP-FPM CONFIGURATION