diff --git a/sys/net80211/ieee80211_node.c b/sys/net80211/ieee80211_node.c
--- a/sys/net80211/ieee80211_node.c
+++ b/sys/net80211/ieee80211_node.c
@@ -1133,7 +1133,7 @@
 
 	ie = ies->data;
 	ielen = ies->len;
-	while (ielen > 0) {
+	while (ielen > 1) {
 		switch (ie[0]) {
 		case IEEE80211_ELEMID_VENDOR:
 			if (iswpaoui(ie))