diff --git a/drivers/staging/r8188eu/os_dep/usb_intf.c b/drivers/staging/r8188eu/os_dep/usb_intf.c
index 1071234d9e5c..d22022b0cc93 100644
--- a/drivers/staging/r8188eu/os_dep/usb_intf.c
+++ b/drivers/staging/r8188eu/os_dep/usb_intf.c
@@ -88,11 +88,6 @@ static inline int RT_usb_endpoint_is_bulk_out(const struct usb_endpoint_descript
 	return RT_usb_endpoint_xfer_bulk(epd) && RT_usb_endpoint_dir_out(epd);
 }
 
-static inline int RT_usb_endpoint_num(const struct usb_endpoint_descriptor *epd)
-{
-	return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
-}
-
 static u8 rtw_init_intf_priv(struct dvobj_priv *dvobj)
 {
 	u8 rst = _SUCCESS;