diff --git a/drivers/net/usb/cdc-phonet.c b/drivers/net/usb/cdc-phonet.c
index 7d78669000d704d8448aea5e24a8a73c312badfc..6358d420e185b4d4cb7b64a0c2a459fc5b70ed7f 100644
--- a/drivers/net/usb/cdc-phonet.c
+++ b/drivers/net/usb/cdc-phonet.c
@@ -328,7 +328,7 @@ MODULE_DEVICE_TABLE(usb, usbpn_ids);
 
 static struct usb_driver usbpn_driver;
 
-int usbpn_probe(struct usb_interface *intf, const struct usb_device_id *id)
+static int usbpn_probe(struct usb_interface *intf, const struct usb_device_id *id)
 {
 	static const char ifname[] = "usbpn%d";
 	const struct usb_cdc_union_desc *union_header = NULL;