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-rw-r--r--usrp/host/lib/usrp_prims.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/usrp/host/lib/usrp_prims.cc b/usrp/host/lib/usrp_prims.cc
index 2fd594fa09..f666a29fc5 100644
--- a/usrp/host/lib/usrp_prims.cc
+++ b/usrp/host/lib/usrp_prims.cc
@@ -1344,7 +1344,7 @@ usrp_write_dboard_offsets (struct usb_dev_handle *udh, int slot_id,
std::string
usrp_serial_number(struct usb_dev_handle *udh)
{
- u_int8_t iserial = usb_device(udh)->descriptor.iSerialNumber;
+ unsigned char iserial = usb_device(udh)->descriptor.iSerialNumber;
if (iserial == 0)
return "";