diff --git a/driver-avalon.c b/driver-avalon.c
index 83cff74f..348a2aea 100644
--- a/driver-avalon.c
+++ b/driver-avalon.c
@@ -531,7 +531,7 @@ static void avalon_initialise(struct cgpu_info *avalon)
 	if (avalon->usbinfo.nodev)
 		return;
 
-	interface = avalon->usbdev->found->interface;
+	interface = usb_interface(avalon);
 	// Reset
 	err = usb_transfer(avalon, FTDI_TYPE_OUT, FTDI_REQUEST_RESET,
 				FTDI_VALUE_RESET, interface, C_RESET);
diff --git a/driver-bflsc.c b/driver-bflsc.c
index 570a65ad..48cadf23 100644
--- a/driver-bflsc.c
+++ b/driver-bflsc.c
@@ -452,7 +452,7 @@ static bool bflsc_qres(struct cgpu_info *bflsc, char *buf, size_t bufsiz, int de
 
 static void __bflsc_initialise(struct cgpu_info *bflsc)
 {
-	int err;
+	int err, interface;
 
 // TODO: does x-link bypass the other device FTDI? (I think it does)
 //	So no initialisation required except for the master device?
@@ -460,9 +460,10 @@ static void __bflsc_initialise(struct cgpu_info *bflsc)
 	if (bflsc->usbinfo.nodev)
 		return;
 
+	interface = usb_interface(bflsc);
 	// Reset
 	err = usb_transfer(bflsc, FTDI_TYPE_OUT, FTDI_REQUEST_RESET,
-				FTDI_VALUE_RESET, bflsc->usbdev->found->interface, C_RESET);
+				FTDI_VALUE_RESET, interface, C_RESET);
 
 	applog(LOG_DEBUG, "%s%i: reset got err %d",
 		bflsc->drv->name, bflsc->device_id, err);
@@ -477,7 +478,7 @@ static void __bflsc_initialise(struct cgpu_info *bflsc)
 
 	// Set data control
 	err = usb_transfer(bflsc, FTDI_TYPE_OUT, FTDI_REQUEST_DATA,
-				FTDI_VALUE_DATA_BAS, bflsc->usbdev->found->interface, C_SETDATA);
+				FTDI_VALUE_DATA_BAS, interface, C_SETDATA);
 
 	applog(LOG_DEBUG, "%s%i: setdata got err %d",
 		bflsc->drv->name, bflsc->device_id, err);
@@ -487,7 +488,7 @@ static void __bflsc_initialise(struct cgpu_info *bflsc)
 
 	// Set the baud
 	err = usb_transfer(bflsc, FTDI_TYPE_OUT, FTDI_REQUEST_BAUD, FTDI_VALUE_BAUD_BAS,
-				(FTDI_INDEX_BAUD_BAS & 0xff00) | bflsc->usbdev->found->interface,
+				(FTDI_INDEX_BAUD_BAS & 0xff00) | interface,
 				C_SETBAUD);
 
 	applog(LOG_DEBUG, "%s%i: setbaud got err %d",
@@ -498,7 +499,7 @@ static void __bflsc_initialise(struct cgpu_info *bflsc)
 
 	// Set Flow Control
 	err = usb_transfer(bflsc, FTDI_TYPE_OUT, FTDI_REQUEST_FLOW,
-				FTDI_VALUE_FLOW, bflsc->usbdev->found->interface, C_SETFLOW);
+				FTDI_VALUE_FLOW, interface, C_SETFLOW);
 
 	applog(LOG_DEBUG, "%s%i: setflowctrl got err %d",
 		bflsc->drv->name, bflsc->device_id, err);
@@ -508,7 +509,7 @@ static void __bflsc_initialise(struct cgpu_info *bflsc)
 
 	// Set Modem Control
 	err = usb_transfer(bflsc, FTDI_TYPE_OUT, FTDI_REQUEST_MODEM,
-				FTDI_VALUE_MODEM, bflsc->usbdev->found->interface, C_SETMODEM);
+				FTDI_VALUE_MODEM, interface, C_SETMODEM);
 
 	applog(LOG_DEBUG, "%s%i: setmodemctrl got err %d",
 		bflsc->drv->name, bflsc->device_id, err);
@@ -518,7 +519,7 @@ static void __bflsc_initialise(struct cgpu_info *bflsc)
 
 	// Clear any sent data
 	err = usb_transfer(bflsc, FTDI_TYPE_OUT, FTDI_REQUEST_RESET,
-				FTDI_VALUE_PURGE_TX, bflsc->usbdev->found->interface, C_PURGETX);
+				FTDI_VALUE_PURGE_TX, interface, C_PURGETX);
 
 	applog(LOG_DEBUG, "%s%i: purgetx got err %d",
 		bflsc->drv->name, bflsc->device_id, err);
@@ -528,7 +529,7 @@ static void __bflsc_initialise(struct cgpu_info *bflsc)
 
 	// Clear any received data
 	err = usb_transfer(bflsc, FTDI_TYPE_OUT, FTDI_REQUEST_RESET,
-				FTDI_VALUE_PURGE_RX, bflsc->usbdev->found->interface, C_PURGERX);
+				FTDI_VALUE_PURGE_RX, interface, C_PURGERX);
 
 	applog(LOG_DEBUG, "%s%i: purgerx got err %d",
 		bflsc->drv->name, bflsc->device_id, err);
diff --git a/driver-bitforce.c b/driver-bitforce.c
index 41deae39..30a6b2dd 100644
--- a/driver-bitforce.c
+++ b/driver-bitforce.c
@@ -81,7 +81,7 @@ struct device_drv bitforce_drv;
 
 static void bitforce_initialise(struct cgpu_info *bitforce, bool lock)
 {
-	int err;
+	int err, interface;
 
 	if (lock)
 		mutex_lock(&bitforce->device_mutex);
@@ -89,9 +89,10 @@ static void bitforce_initialise(struct cgpu_info *bitforce, bool lock)
 	if (bitforce->usbinfo.nodev)
 		goto failed;
 
+	interface = usb_interface(bitforce);
 	// Reset
 	err = usb_transfer(bitforce, FTDI_TYPE_OUT, FTDI_REQUEST_RESET,
-				FTDI_VALUE_RESET, bitforce->usbdev->found->interface, C_RESET);
+				FTDI_VALUE_RESET, interface, C_RESET);
 	if (opt_debug)
 		applog(LOG_DEBUG, "%s%i: reset got err %d",
 			bitforce->drv->name, bitforce->device_id, err);
@@ -101,7 +102,7 @@ static void bitforce_initialise(struct cgpu_info *bitforce, bool lock)
 
 	// Set data control
 	err = usb_transfer(bitforce, FTDI_TYPE_OUT, FTDI_REQUEST_DATA,
-				FTDI_VALUE_DATA_BFL, bitforce->usbdev->found->interface, C_SETDATA);
+				FTDI_VALUE_DATA_BFL, interface, C_SETDATA);
 	if (opt_debug)
 		applog(LOG_DEBUG, "%s%i: setdata got err %d",
 			bitforce->drv->name, bitforce->device_id, err);
@@ -111,7 +112,7 @@ static void bitforce_initialise(struct cgpu_info *bitforce, bool lock)
 
 	// Set the baud
 	err = usb_transfer(bitforce, FTDI_TYPE_OUT, FTDI_REQUEST_BAUD, FTDI_VALUE_BAUD_BFL,
-				(FTDI_INDEX_BAUD_BFL & 0xff00) | bitforce->usbdev->found->interface,
+				(FTDI_INDEX_BAUD_BFL & 0xff00) | interface,
 				C_SETBAUD);
 	if (opt_debug)
 		applog(LOG_DEBUG, "%s%i: setbaud got err %d",
@@ -122,7 +123,7 @@ static void bitforce_initialise(struct cgpu_info *bitforce, bool lock)
 
 	// Set Flow Control
 	err = usb_transfer(bitforce, FTDI_TYPE_OUT, FTDI_REQUEST_FLOW,
-				FTDI_VALUE_FLOW, bitforce->usbdev->found->interface, C_SETFLOW);
+				FTDI_VALUE_FLOW, interface, C_SETFLOW);
 	if (opt_debug)
 		applog(LOG_DEBUG, "%s%i: setflowctrl got err %d",
 			bitforce->drv->name, bitforce->device_id, err);
@@ -132,7 +133,7 @@ static void bitforce_initialise(struct cgpu_info *bitforce, bool lock)
 
 	// Set Modem Control
 	err = usb_transfer(bitforce, FTDI_TYPE_OUT, FTDI_REQUEST_MODEM,
-				FTDI_VALUE_MODEM, bitforce->usbdev->found->interface, C_SETMODEM);
+				FTDI_VALUE_MODEM, interface, C_SETMODEM);
 	if (opt_debug)
 		applog(LOG_DEBUG, "%s%i: setmodemctrl got err %d",
 			bitforce->drv->name, bitforce->device_id, err);
@@ -142,7 +143,7 @@ static void bitforce_initialise(struct cgpu_info *bitforce, bool lock)
 
 	// Clear any sent data
 	err = usb_transfer(bitforce, FTDI_TYPE_OUT, FTDI_REQUEST_RESET,
-				FTDI_VALUE_PURGE_TX, bitforce->usbdev->found->interface, C_PURGETX);
+				FTDI_VALUE_PURGE_TX, interface, C_PURGETX);
 	if (opt_debug)
 		applog(LOG_DEBUG, "%s%i: purgetx got err %d",
 			bitforce->drv->name, bitforce->device_id, err);
@@ -152,7 +153,7 @@ static void bitforce_initialise(struct cgpu_info *bitforce, bool lock)
 
 	// Clear any received data
 	err = usb_transfer(bitforce, FTDI_TYPE_OUT, FTDI_REQUEST_RESET,
-				FTDI_VALUE_PURGE_RX, bitforce->usbdev->found->interface, C_PURGERX);
+				FTDI_VALUE_PURGE_RX, interface, C_PURGERX);
 	if (opt_debug)
 		applog(LOG_DEBUG, "%s%i: purgerx got err %d",
 			bitforce->drv->name, bitforce->device_id, err);