diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index b170c455a40bd3e82735d1afd01db628552f35da..175c36f3fdac944772f56c74d4ea386967d1cdac 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -410,6 +410,8 @@ static void ath9k_hw_init_defaults(struct ath_hw *ah)
 	ah->sta_id1_defaults =
 		AR_STA_ID1_CRPT_MIC_ENABLE |
 		AR_STA_ID1_MCAST_KSRCH;
+	if (AR_SREV_9100(ah))
+		ah->sta_id1_defaults |= AR_STA_ID1_AR9100_BA_FIX;
 	ah->enable_32kHz_clock = DONT_USE_32KHZ;
 	ah->slottime = 20;
 	ah->globaltxtimeout = (u32) -1;
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index 8fa8acfde62ee22df8922134501020fa0afb320b..693d543937b599d0e311383db220a007bfc3dd21 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -1396,6 +1396,7 @@ enum {
 #define AR_STA_ID1_PCF             0x00100000
 #define AR_STA_ID1_USE_DEFANT      0x00200000
 #define AR_STA_ID1_DEFANT_UPDATE   0x00400000
+#define AR_STA_ID1_AR9100_BA_FIX   0x00400000
 #define AR_STA_ID1_RTS_USE_DEF     0x00800000
 #define AR_STA_ID1_ACKCTS_6MB      0x01000000
 #define AR_STA_ID1_BASE_RATE_11B   0x02000000