diff --git a/bliss/controllers/motors/aerotech.py b/bliss/controllers/motors/aerotech.py
index 445144c9b0a806eb057d38177c14fccc3811e97b..3755e517eba9a8860783fdf78029a10c60217db1 100644
--- a/bliss/controllers/motors/aerotech.py
+++ b/bliss/controllers/motors/aerotech.py
@@ -697,7 +697,7 @@ class Aerotech(Controller):
     def _cmd(self, cmd, axis, *cmd_args, reply=True):
         aero_name = self._aero_name(axis)
         if aero_name:
-            args = [aero_name] + cmd_args
+            args = [aero_name] + list(cmd_args)
         else:
             args = cmd_args
         if reply: