diff --git a/drivers/staging/r8188eu/core/rtw_pwrctrl.c b/drivers/staging/r8188eu/core/rtw_pwrctrl.c
index f13bd5cdaa23..bd03b229a797 100644
--- a/drivers/staging/r8188eu/core/rtw_pwrctrl.c
+++ b/drivers/staging/r8188eu/core/rtw_pwrctrl.c
@@ -248,7 +248,7 @@ static bool lps_rf_on(struct adapter *adapter)
  *	-1:	Timeout
  *	-2:	Other error
  */
-s32 LPS_RF_ON_check(struct adapter *padapter, u32 delay_ms)
+static s32 LPS_RF_ON_check(struct adapter *padapter, u32 delay_ms)
 {
 	u32 start_time;
 	s32 err = 0;
diff --git a/drivers/staging/r8188eu/include/rtw_pwrctrl.h b/drivers/staging/r8188eu/include/rtw_pwrctrl.h
index affaf4ca5495..3084d00628bd 100644
--- a/drivers/staging/r8188eu/include/rtw_pwrctrl.h
+++ b/drivers/staging/r8188eu/include/rtw_pwrctrl.h
@@ -104,7 +104,6 @@ int ips_leave(struct adapter *padapter);
 
 void rtw_ps_processor(struct adapter *padapter);
 
-s32 LPS_RF_ON_check(struct adapter *adapter, u32 delay_ms);
 void LPS_Enter(struct adapter *adapter);
 void LPS_Leave(struct adapter *adapter);