diff --git a/mt7925/mcu.h b/mt7925/mcu.h
index 2cf39276..2a0bbfe7 100644
--- a/mt7925/mcu.h
+++ b/mt7925/mcu.h
@@ -222,7 +222,7 @@ struct scan_req_tlv {
 	__le16 channel_dwell_time; /* channel Dwell interval */
 	__le16 timeout_value;
 	__le16 probe_delay_time;
-	u8 func_mask_ext;
+	__le32 func_mask_ext;
 };
 
 struct scan_ssid_tlv {