diff --git a/libfprint/fp-device.c b/libfprint/fp-device.c
index 35e2f2b..4d19bf0 100644
--- a/libfprint/fp-device.c
+++ b/libfprint/fp-device.c
@@ -245,7 +245,6 @@ fp_device_get_property (GObject    *object,
 {
   FpDevice *self = FP_DEVICE (object);
   FpDevicePrivate *priv = fp_device_get_instance_private (self);
-  FpDeviceClass *cls = FP_DEVICE_GET_CLASS (self);
 
   switch (prop_id)
     {
@@ -285,24 +284,6 @@ fp_device_get_property (GObject    *object,
       g_value_set_boolean (value, priv->is_removed);
       break;
 
-    case PROP_FPI_USB_DEVICE:
-      g_value_set_object (value, priv->usb_device);
-      break;
-
-    case PROP_FPI_UDEV_DATA_SPIDEV:
-      if (cls->type == FP_DEVICE_TYPE_UDEV)
-        g_value_set_string (value, g_strdup (priv->udev_data.spidev_path));
-      else
-        g_value_set_string (value, NULL);
-      break;
-
-    case PROP_FPI_UDEV_DATA_HIDRAW:
-      if (cls->type == FP_DEVICE_TYPE_UDEV)
-        g_value_set_string (value, g_strdup (priv->udev_data.hidraw_path));
-      else
-        g_value_set_string (value, NULL);
-      break;
-
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
     }
@@ -549,7 +530,7 @@ fp_device_class_init (FpDeviceClass *klass)
                          "USB Device",
                          "Private: The USB device for the device",
                          G_USB_TYPE_DEVICE,
-                         G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
+                         G_PARAM_STATIC_STRINGS | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY);
   /**
    * FpDevice::fpi-udev-data-spidev: (skip)
    *
@@ -562,7 +543,7 @@ fp_device_class_init (FpDeviceClass *klass)
                          "Udev data: spidev path",
                          "Private: The path to /dev/spidevN.M",
                          NULL,
-                         G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
+                         G_PARAM_STATIC_STRINGS | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY);
   /**
    * FpDevice::fpi-udev-data-hidraw: (skip)
    *
@@ -575,7 +556,7 @@ fp_device_class_init (FpDeviceClass *klass)
                          "Udev data: hidraw path",
                          "Private: The path to /dev/hidrawN",
                          NULL,
-                         G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
+                         G_PARAM_STATIC_STRINGS | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY);
 
   /**
    * FpDevice::fpi-driver-data: (skip)