diff --git a/addons/hw_scanner/controllers/main.py b/addons/hw_scanner/controllers/main.py
index 4c3150a269e..2319a0c7c2e 100644
--- a/addons/hw_scanner/controllers/main.py
+++ b/addons/hw_scanner/controllers/main.py
@@ -120,10 +120,10 @@ class Scanner(Thread):
     def get_devices(self):
         try:
             if not evdev:
-                return None
+                return []
 
             if not os.path.isdir(self.input_dir):
-                return None
+                return []
 
             new_devices = [device for device in listdir(self.input_dir)
                            if join(self.input_dir, device) not in [dev.evdev.fn for dev in self.open_devices]]