diff --git a/drivers/staging/rtl8188eu/include/wifi.h b/drivers/staging/rtl8188eu/include/wifi.h
index 259bf2cce2d5..0664d5f30a96 100644
--- a/drivers/staging/rtl8188eu/include/wifi.h
+++ b/drivers/staging/rtl8188eu/include/wifi.h
@@ -257,14 +257,6 @@ enum WIFI_REG_DOMAIN {
 
 #define GetAddr4Ptr(pbuf)	((unsigned char *)((size_t)(pbuf) + 24))
 
-static inline int IS_MCAST(unsigned char *da)
-{
-	if ((*da) & 0x01)
-		return true;
-	else
-		return false;
-}
-
 static inline unsigned char *get_da(unsigned char *pframe)
 {
 	unsigned char	*da;