--- a/net80211/ieee80211.c
+++ b/net80211/ieee80211.c
@@ -695,6 +695,7 @@
 	int i;
 
 	/* Brute force search */
+	flags &= IEEE80211_CHAN_ALLTURBO;
 	for (i = 0; i < ic->ic_nchans; i++) {
 		c = &ic->ic_channels[i];
 		if (c->ic_freq == freq &&