diff --git a/usb_application/simtrace.py b/usb_application/simtrace.py
index 29379356..cf77e215 100755
--- a/usb_application/simtrace.py
+++ b/usb_application/simtrace.py
@@ -31,9 +31,9 @@ def main():
 
     args = parser.parse_args()
     print("args: ", args)
+    dev = find_dev()
 
     if args.conf is not None:
-        dev = find_dev()
         dev.set_configuration(args.conf)
         # Give pcsclite time to find the device
         time.sleep(1)