diff --git a/libfprint/fpi-device.c b/libfprint/fpi-device.c
index 2121537c..59bb074f 100644
--- a/libfprint/fpi-device.c
+++ b/libfprint/fpi-device.c
@@ -68,6 +68,8 @@ error_to_string (GError * error)
     domain_str = g_enum_to_string (FP_TYPE_DEVICE_ERROR, error->code);
   else if (error->domain == G_IO_ERROR)
     domain_str = g_enum_to_string (g_io_error_enum_get_type (), error->code);
+  else if (error->domain == G_USB_DEVICE_ERROR)
+    domain_str = g_strdup_printf ("G_USB_DEVICE_ERROR_%u", error->code);
   else
     domain_str = g_strdup_printf ("UNKNOWN_ERROR_%u", error->domain);