diff --git a/drivers/staging/rtl8723au/include/hal_intf.h b/drivers/staging/rtl8723au/include/hal_intf.h
index 0b07e8b1f068d4bb0579286299d2ebb017f9a072..89516467f24107fa10ca2f46a0144276b26d8485 100644
--- a/drivers/staging/rtl8723au/include/hal_intf.h
+++ b/drivers/staging/rtl8723au/include/hal_intf.h
@@ -215,10 +215,6 @@ enum hardware_type {
 
 #define GET_EEPROM_EFUSE_PRIV(adapter) (&adapter->eeprompriv)
 
-extern int rtw_ht_enable23A;
-extern int rtw_cbw40_enable23A;
-extern int rtw_ampdu_enable23A;/* for enable tx_ampdu */
-
 void rtw_hal_def_value_init23a(struct rtw_adapter *padapter);
 int pm_netdev_open23a(struct net_device *pnetdev, u8 bnormal);
 int rtw_resume_process23a(struct rtw_adapter *padapter);
diff --git a/drivers/staging/rtl8723au/os_dep/os_intfs.c b/drivers/staging/rtl8723au/os_dep/os_intfs.c
index 49da7dd18171158a98f079413b1afa190e3faf2a..26882aac414f4c008b42ae37a63789eff35aa1d4 100644
--- a/drivers/staging/rtl8723au/os_dep/os_intfs.c
+++ b/drivers/staging/rtl8723au/os_dep/os_intfs.c
@@ -65,10 +65,10 @@ static int rtw_acm_method;/*  0:By SW 1:By HW. */
 static int rtw_wmm_enable = 1;/*  default is set to enable the wmm. */
 static int rtw_uapsd_enable;
 
-int rtw_ht_enable23A = 1;
+static int rtw_ht_enable23A = 1;
 /* 0 :diable, bit(0): enable 2.4g, bit(1): enable 5g */
-int rtw_cbw40_enable23A = 3;
-int rtw_ampdu_enable23A = 1;/* for enable tx_ampdu */
+static int rtw_cbw40_enable23A = 3;
+static int rtw_ampdu_enable23A = 1;/* for enable tx_ampdu */
 /*  0: disable, bit(0):enable 2.4g, bit(1):enable 5g, default is set to enable
  * 2.4GHZ for IOT issue with bufflao's AP at 5GHZ
  */