diff --git a/package/mac80211/patches/544-ath9k_fix_sleep_mode_reg.patch b/package/mac80211/patches/544-ath9k_fix_sleep_mode_reg.patch
new file mode 100644
index 00000000000..2231b444e6b
--- /dev/null
+++ b/package/mac80211/patches/544-ath9k_fix_sleep_mode_reg.patch
@@ -0,0 +1,12 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -1846,7 +1846,8 @@ static void ath9k_set_power_sleep(struct
+ 	}
+ 
+ 	/* Clear Bit 14 of AR_WA after putting chip into Full Sleep mode. */
+-	REG_WRITE(ah, AR_WA, ah->WARegVal & ~AR_WA_D3_L1_DISABLE);
++	if (AR_SREV_9300_20_OR_LATER(ah))
++		REG_WRITE(ah, AR_WA, ah->WARegVal & ~AR_WA_D3_L1_DISABLE);
+ }
+ 
+ /*