diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c
index f47d13b..3cbaf53 100644
--- a/net/mac80211/wext.c
+++ b/net/mac80211/wext.c
@@ -721,6 +721,9 @@
 
 	if (rts->disabled)
 		local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
+	else if (!rts->fixed)
+		/* if the rts value is not fixed, then take default */
+		local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 	else if (rts->value < 0 || rts->value > IEEE80211_MAX_RTS_THRESHOLD)
 		return -EINVAL;
 	else