diff --git a/drivers/staging/rtl8723au/core/rtw_ap.c b/drivers/staging/rtl8723au/core/rtw_ap.c
index 84e010c4dcea7c07ddd309faa1bf76c1f2091719..5748da4ada15510d0936942abba25767a3c10230 100644
--- a/drivers/staging/rtl8723au/core/rtw_ap.c
+++ b/drivers/staging/rtl8723au/core/rtw_ap.c
@@ -84,7 +84,7 @@ static void update_BCNTIM(struct rtw_adapter *padapter)
 
 		premainder_ie = p+tim_ielen;
 
-		tim_ie_offset = (int)(p -pie);
+		tim_ie_offset = (int)(p - pie);
 
 		remainder_ielen = pnetwork_mlmeext->IELength - tim_ie_offset - tim_ielen;