diff --git a/src/udev.c b/src/udev.c
index acf10f8..1c5ebd8 100644
--- a/src/udev.c
+++ b/src/udev.c
@@ -12,7 +12,7 @@ static void udev_event_cb(GUdevClient *client, gchar *action, GUdevDevice *devic
 {
     struct EG25Manager *manager = data;
 
-    if (strcmp(action, "unbind") != 0 || manager->modem_state == EG25_STATE_RESETTING)
+    if (strcmp(action, "unbind") != 0 || manager->modem_state == EG25_STATE_RESETTING || !manager->modem_usb_id)
         return;
 
     if (strncmp(g_udev_device_get_name(device), manager->modem_usb_id, strlen(manager->modem_usb_id)) == 0 &&