diff --git a/addons/hw_escpos/controllers/main.py b/addons/hw_escpos/controllers/main.py
index dbe2b12bcc5..9ad36080bd9 100644
--- a/addons/hw_escpos/controllers/main.py
+++ b/addons/hw_escpos/controllers/main.py
@@ -11,12 +11,13 @@ import time
 import netifaces as ni
 import traceback
 
-try: 
+escpos = printer = None
+try:
     from .. escpos import *
     from .. escpos.exceptions import *
     from .. escpos.printer import Usb
 except ImportError:
-    escpos = printer = None
+    pass
 
 from queue import Queue
 from threading import Thread, Lock