diff --git a/drivers/net/wireless/rtl818x/rtl8180_dev.c b/drivers/net/wireless/rtl818x/rtl8180_dev.c
index 515817de29058483c25d00d7537de67fd9b8776a..42705028751d5caf7893a933fe9e5fb47b917958 100644
--- a/drivers/net/wireless/rtl818x/rtl8180_dev.c
+++ b/drivers/net/wireless/rtl818x/rtl8180_dev.c
@@ -671,7 +671,7 @@ static u64 rtl8180_get_tsf(struct ieee80211_hw *dev)
 	       (u64)(rtl818x_ioread32(priv, &priv->map->TSFT[1])) << 32;
 }
 
-void rtl8180_beacon_work(struct work_struct *work)
+static void rtl8180_beacon_work(struct work_struct *work)
 {
 	struct rtl8180_vif *vif_priv =
 		container_of(work, struct rtl8180_vif, beacon_work.work);