diff --git a/software/glasgow/device.py b/software/glasgow/device.py
index 160b54f40..e9676d28e 100644
--- a/software/glasgow/device.py
+++ b/software/glasgow/device.py
@@ -36,7 +36,7 @@ class GlasgowDeviceError(FX2DeviceError):
 class GlasgowDevice(FX2Device):
     def __init__(self, firmware_file=None):
         super().__init__(VID_QIHW, PID_GLASGOW)
-        if self._device.getDevice().getbcdDevice() == 0:
+        if self.usb.getDevice().getbcdDevice() == 0:
             if firmware_file is None:
                 raise GlasgowDeviceError("Firmware is not uploaded")
             else:
@@ -49,7 +49,7 @@ def __init__(self, firmware_file=None):
                 super().__init__(VID_QIHW, PID_GLASGOW)
 
                 # still not the right firmware?
-                if self._device.getDevice().getbcdDevice() == 0:
+                if self.usb.getDevice().getbcdDevice() == 0:
                     raise GlasgowDeviceError("Firmware upload failed")
 
     def read_eeprom(self, idx, addr, length):
diff --git a/vendor/libfx2 b/vendor/libfx2
index fc863fed8..c48fef307 160000
--- a/vendor/libfx2
+++ b/vendor/libfx2
@@ -1 +1 @@
-Subproject commit fc863fed8a13f6c2ba3184707286c2ba73b57a8f
+Subproject commit c48fef307fda96618d76e600477fcdaf0f7d5cdb