diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index f8bbd0b6d9fe..ad308c8e9af5 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -95,6 +95,8 @@ struct usb_host_interface *usb_find_alt_setting(
 	struct usb_interface_cache *intf_cache = NULL;
 	int i;
 
+	if (!config)
+		return NULL;
 	for (i = 0; i < config->desc.bNumInterfaces; i++) {
 		if (config->intf_cache[i]->altsetting[0].desc.bInterfaceNumber
 				== iface_num) {