diff --git a/docs/BUILD.md b/docs/BUILD.md
index 769b892..4689621 100644
--- a/docs/BUILD.md
+++ b/docs/BUILD.md
@@ -192,6 +192,8 @@ for luma also add:
   kernel/filesystems -> kmod-fs-exfat, kmod-fs-ext4, kmod-fs-vfat, kmod-usb-storage
 ```
 
+TODO: What kernel wifi modules on EW-72? Use `ath9k` and `ath10k` for now.
+
 TODO: Make `defconfig` for different hardware.
 
 Hit `<TAB>` to get to `EXIT`, then `<ENTER>` to select `Yes` to save the configuration.