diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.h b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.h
index 8902e16508b7..c673e986ecb5 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.h
@@ -917,7 +917,7 @@ enum {
 #define MT7996_BEACON_UPDATE_SIZE	(sizeof(struct bss_req_hdr) +		\
 					 sizeof(struct bss_bcn_content_tlv) +	\
 					 4 + MT_TXD_SIZE +			\
-					 sizeof(struct bss_bcn_cntdwn_tlv) +	\
+					 sizeof(struct bss_bcn_cntdwn_tlv) * 2 +	\
 					 sizeof(struct bss_bcn_mbss_tlv))
 #define MT7996_MAX_BSS_OFFLOAD_SIZE	2048
 #define MT7996_MAX_BEACON_SIZE		(MT7996_MAX_BSS_OFFLOAD_SIZE - \