diff --git a/src/ant/core/driver.py b/src/ant/core/driver.py
index a091d68..bd39220 100644
--- a/src/ant/core/driver.py
+++ b/src/ant/core/driver.py
@@ -30,6 +30,7 @@
 # USB2 driver uses direct USB connection. Requires PyUSB
 import usb.core
 import usb.util
+import usb.control
 
 from ant.core.exceptions import DriverError
 
@@ -194,7 +195,7 @@ def _open(self):
         alternate_setting = usb.control.get_interface(dev, interface_number)
         intf = usb.util.find_descriptor(
             cfg, bInterfaceNumber = interface_number,
-            AlternateSetting = alternate_setting
+            bAlternateSetting = alternate_setting
         )
         usb.util.claim_interface(dev, interface_number)
         ep_out = usb.util.find_descriptor(