diff --git a/sys/net80211/ieee80211_crypto.c b/sys/net80211/ieee80211_crypto.c
--- a/sys/net80211/ieee80211_crypto.c
+++ b/sys/net80211/ieee80211_crypto.c
@@ -741,7 +741,7 @@
 		k = &ni->ni_ucastkey;
 
 	/*
-	 * Insure crypto header is contiguous and long enough for all
+	 * Ensure crypto header is contiguous and long enough for all
 	 * decap work.
 	 */
 	cip = k->wk_cipher;