diff --git a/mt7996/mcu.c b/mt7996/mcu.c
index 5ad2a020..3d47a119 100644
--- a/mt7996/mcu.c
+++ b/mt7996/mcu.c
@@ -3925,8 +3925,9 @@ int mt7996_mcu_set_txbf(struct mt7996_dev *dev, u8 action)
 
 		tlv = mt7996_mcu_add_uni_tlv(skb, action, sizeof(*req_mod_en));
 		req_mod_en = (struct bf_mod_en_ctrl *)tlv;
-		req_mod_en->bf_num = 3;
-		req_mod_en->bf_bitmap = GENMASK(2, 0);
+		req_mod_en->bf_num = mt7996_band_valid(dev, MT_BAND2) ? 3 : 2;
+		req_mod_en->bf_bitmap = mt7996_band_valid(dev, MT_BAND2) ?
+					GENMASK(2, 0) : GENMASK(1, 0);
 		break;
 	}
 	default: