diff --git a/mt7603/main.c b/mt7603/main.c
index 0f9d2715..3c7626eb 100644
--- a/mt7603/main.c
+++ b/mt7603/main.c
@@ -415,8 +415,6 @@ mt7603_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 
 	/* fall back to sw encryption for unsupported ciphers */
 	switch (key->cipher) {
-	case WLAN_CIPHER_SUITE_WEP40:
-	case WLAN_CIPHER_SUITE_WEP104:
 	case WLAN_CIPHER_SUITE_TKIP:
 	case WLAN_CIPHER_SUITE_CCMP:
 		break;