diff --git a/drivers/staging/rtl8723au/os_dep/ioctl_cfg80211.c b/drivers/staging/rtl8723au/os_dep/ioctl_cfg80211.c
index f547ac66d05c..a0d44c679f55 100644
--- a/drivers/staging/rtl8723au/os_dep/ioctl_cfg80211.c
+++ b/drivers/staging/rtl8723au/os_dep/ioctl_cfg80211.c
@@ -1118,7 +1118,7 @@ static int cfg80211_rtw_get_station(struct wiphy *wiphy,
 	return ret;
 }
 
-int cfg80211_infrastructure_mode(struct rtw_adapter *padapter,
+static int cfg80211_infrastructure_mode(struct rtw_adapter *padapter,
 				 enum nl80211_iftype ifmode)
 {
 	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;