diff --git a/mt7603/mac.c b/mt7603/mac.c
index 4c06c086..81a2fbc1 100644
--- a/mt7603/mac.c
+++ b/mt7603/mac.c
@@ -389,7 +389,7 @@ void mt7603_mac_tx_ba_reset(struct mt7603_dev *dev, int wcid, int tid, int ssn,
 	mt7603_mac_start(dev);
 
 	for (i = 7; i > 0; i--) {
-		if (ba_size >= MT_AGG_SIZE_LIMIT(i))
+		if (ba_size < MT_AGG_SIZE_LIMIT(i))
 			break;
 	}
 
diff --git a/mt7603/mt7603.h b/mt7603/mt7603.h
index 27ac2f4a..51f5c49a 100644
--- a/mt7603/mt7603.h
+++ b/mt7603/mt7603.h
@@ -39,7 +39,7 @@
 
 #define MT7603_EEPROM_SIZE	1024
 
-#define MT_AGG_SIZE_LIMIT(n)	((4 + 2 * ((n) & 1)) << ((n) / 2))
+#define MT_AGG_SIZE_LIMIT(_n)	(((_n) + 1) * 4)
 
 #define MT7603_PRE_TBTT_TIME	5000 /* ms */