diff --git a/drivers/net/wireless/ath/key.c b/drivers/net/wireless/ath/key.c
index 29a2961af5fc28f86441642c2165c613c4488fba..5d465e5fcf24560850eba244f3d266cbbda0c8da 100644
--- a/drivers/net/wireless/ath/key.c
+++ b/drivers/net/wireless/ath/key.c
@@ -58,6 +58,8 @@ bool ath_hw_keyreset(struct ath_common *common, u16 entry)
 		REG_WRITE(ah, AR_KEYTABLE_KEY1(micentry), 0);
 		REG_WRITE(ah, AR_KEYTABLE_KEY2(micentry), 0);
 		REG_WRITE(ah, AR_KEYTABLE_KEY3(micentry), 0);
+		if (common->crypt_caps & ATH_CRYPT_CAP_MIC_COMBINED)
+			REG_WRITE(ah, AR_KEYTABLE_KEY4(micentry), 0);
 
 	}