diff --git a/usr.sbin/ancontrol/ancontrol.8 b/usr.sbin/ancontrol/ancontrol.8
index fe0dfa73f244..eda76bad5f8b 100644
--- a/usr.sbin/ancontrol/ancontrol.8
+++ b/usr.sbin/ancontrol/ancontrol.8
@@ -474,7 +474,7 @@ WEP
 is based on the RC4 algorithm,
 using a 24 bit initialization vector.
 .Pp
-RC4 is supposedly vunerable to certain known plaintext attacks,
+RC4 is supposedly vulnerable to certain known plaintext attacks,
 especially with 40 bit keys.
 So the security of WEP in part depends on how much known plaintext
 is transmitted.