diff --git a/drivers/staging/r8188eu/core/rtw_recv.c b/drivers/staging/r8188eu/core/rtw_recv.c
index cc91638a085d..6564e82ddd66 100644
--- a/drivers/staging/r8188eu/core/rtw_recv.c
+++ b/drivers/staging/r8188eu/core/rtw_recv.c
@@ -24,7 +24,7 @@ static u8 rtw_rfc1042_header[] = {
 	0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
 };
 
-void rtw_signal_stat_timer_hdl(struct timer_list *t);
+static void rtw_signal_stat_timer_hdl(struct timer_list *t);
 
 void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
 {
@@ -1794,7 +1794,7 @@ _recv_entry_drop:
 	return ret;
 }
 
-void rtw_signal_stat_timer_hdl(struct timer_list *t)
+static void rtw_signal_stat_timer_hdl(struct timer_list *t)
 {
 	struct adapter *adapter = from_timer(adapter, t, recvpriv.signal_stat_timer);
 	struct recv_priv *recvpriv = &adapter->recvpriv;