diff --git a/BoardConfig.mk b/BoardConfig.mk
index 9ec5dba..c0ab45d 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -90,10 +90,18 @@ TARGET_COPY_OUT_VENDOR := vendor
 
 
 # Wifi
-# Generic nl80211/cfg80211 only: WiFi comes from USB adapters (mt76, rtw88,
-# ath9k_htc, ...). No BOARD_WLAN_DEVICE / private driver-command lib — those
-# inject vendor-private commands (bcmdhd's were used previously) that generic
-# mac80211 drivers reject.
+# BOARD_WLAN_DEVICE := bcmdhd selects the Broadcom wifi HAL implementation.
+# Despite its name, bcmdhd's init_wifi_vendor_hal_func_table uses purely
+# generic nl80211 — it scans /sys/class/net/ for phy80211 interfaces, creates
+# netlink sockets, and resolves the nl80211 family ID.  The functions are
+# Broadcom-generic, not bcmdhd-specific; any nl80211-compatible adapter
+# (mt7921u, rtw88, ath9k_htc, etc.) works fine.
+#
+# Without BOARD_WLAN_DEVICE, libwifi-hal's fallback returns
+# WIFI_ERROR_NOT_SUPPORTED from init_wifi_vendor_hal_func_table, causing the
+# AIDL wifi HAL (com.android.hardware.wifi) to fail at startup with "Can not
+# initialize the vendor function pointer table".
+BOARD_WLAN_DEVICE := bcmdhd
 BOARD_HOSTAPD_DRIVER := NL80211
 BOARD_WPA_SUPPLICANT_DRIVER := NL80211
 #WIFI_HIDL_UNIFIED_SUPPLICANT_SERVICE_RC_ENTRY := true