diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index 4f0cfb8cc682..18f5dc80de10 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -677,7 +677,7 @@ static int cfg80211_wext_siwencodeext(struct net_device *dev,
 
 	idx = erq->flags & IW_ENCODE_INDEX;
 	if (cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
-		if (idx < 4 || idx > 5) {
+		if (idx < 5 || idx > 6) {
 			idx = wdev->wext.default_mgmt_key;
 			if (idx < 0)
 				return -EINVAL;