diff --git a/drivers/net/wireless/realtek/rtw89/mac.c b/drivers/net/wireless/realtek/rtw89/mac.c
index 5ab0590485e0..ea34b4df21a7 100644
--- a/drivers/net/wireless/realtek/rtw89/mac.c
+++ b/drivers/net/wireless/realtek/rtw89/mac.c
@@ -3930,10 +3930,12 @@ static void rtw89_mac_port_tsf_sync(struct rtw89_dev *rtwdev,
 
 	/* adjust offset randomly to avoid beacon conflict */
 	offset = offset - offset / 4 + get_random_u32() % (offset / 2);
-	val = RTW89_PORT_OFFSET_MS_TO_32US((*n_offset)++, offset);
+	val = (*n_offset) * RTW89_PORT_OFFSET_TU_TO_32US(offset);
 	reg = rtw89_mac_reg_by_idx(R_AX_PORT0_TSF_SYNC + rtwvif->port * 4,
 				   rtwvif->mac_idx);
 
+	(*n_offset)++;
+
 	rtw89_write32_mask(rtwdev, reg, B_AX_SYNC_PORT_SRC, rtwvif_src->port);
 	rtw89_write32_mask(rtwdev, reg, B_AX_SYNC_PORT_OFFSET_VAL, val);
 	rtw89_write32_set(rtwdev, reg, B_AX_SYNC_NOW);
diff --git a/drivers/net/wireless/realtek/rtw89/mac.h b/drivers/net/wireless/realtek/rtw89/mac.h
index f0b684b205f1..255627159744 100644
--- a/drivers/net/wireless/realtek/rtw89/mac.h
+++ b/drivers/net/wireless/realtek/rtw89/mac.h
@@ -168,7 +168,7 @@ enum rtw89_mac_ax_l0_to_l1_event {
 	MAC_AX_L0_TO_L1_EVENT_MAX = 15,
 };
 
-#define RTW89_PORT_OFFSET_MS_TO_32US(n, shift_ms) ((n) * (shift_ms) * 1000 / 32)
+#define RTW89_PORT_OFFSET_TU_TO_32US(shift_tu) ((shift_tu) * 1024 / 32)
 
 enum rtw89_mac_dbg_port_sel {
 	/* CMAC 0 related */