diff --git a/sys/dev/iwi/if_iwi.c b/sys/dev/iwi/if_iwi.c
--- a/sys/dev/iwi/if_iwi.c
+++ b/sys/dev/iwi/if_iwi.c
@@ -2534,9 +2534,10 @@
 
 		wepkey.cmd = IWI_WEP_KEY_CMD_SETKEY;
 		wepkey.idx = i;
-		wepkey.len = wk->wk_keylen;
+		wepkey.len = ieee80211_crypto_get_key_len(wk);
 		memset(wepkey.key, 0, sizeof wepkey.key);
-		memcpy(wepkey.key, wk->wk_key, wk->wk_keylen);
+		memcpy(wepkey.key, ieee80211_crypto_get_key_data(wk),
+		    ieee80211_crypto_get_key_len(wk));
 		DPRINTF(("Setting wep key index %u len %u\n", wepkey.idx,
 		    wepkey.len));
 		error = iwi_cmd(sc, IWI_CMD_SET_WEP_KEY, &wepkey,