diff --git a/drivers/net/wireless/p54/p54common.c b/drivers/net/wireless/p54/p54common.c
index ae31e3775e0c..12d0717c3992 100644
--- a/drivers/net/wireless/p54/p54common.c
+++ b/drivers/net/wireless/p54/p54common.c
@@ -2077,7 +2077,7 @@ static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
 			algo = P54_CRYPTO_AESCCMP;
 			break;
 		default:
-			return -EINVAL;
+			return -EOPNOTSUPP;
 		}
 	}