diff --git a/lib/sdk/adapters/usbboot/index.js b/lib/sdk/adapters/usbboot/index.js
index f41ed0c5..c612d44f 100644
--- a/lib/sdk/adapters/usbboot/index.js
+++ b/lib/sdk/adapters/usbboot/index.js
@@ -449,11 +449,15 @@ class USBBootAdapter extends EventEmitter {
       message: 'LIBUSB_TRANSFER_CANCELLED'
     }, {
       message: 'LIBUSB_ERROR_NO_DEVICE'
-    }, _.constant(null)).tap((result) => {
+    }, ((error) => {
+      debug(`Swallowed error: ${error.message} ${error.stack}`)
+      return null
+    })).tap((result) => {
       if (result) {
         result.close()
       }
     }).finally(() => {
+      debug('Reboot delay')
       return Bluebird.delay(DEVICE_REBOOT_DELAY).then(() => {
         Reflect.deleteProperty(this.progress, device.raw)
       })