diff --git a/stage2/02-net-tweaks/01-run.sh b/stage2/02-net-tweaks/01-run.sh
index 5777d96..d82381b 100755
--- a/stage2/02-net-tweaks/01-run.sh
+++ b/stage2/02-net-tweaks/01-run.sh
@@ -27,7 +27,7 @@ fi
 
 # Disable wifi on 5GHz models if WPA_COUNTRY is not set
 mkdir -p "${ROOTFS_DIR}/var/lib/systemd/rfkill/"
-if [ -v WPA_COUNTRY ]; then
+if [ -n "$WPA_COUNTRY" ]; then
     echo 0 > "${ROOTFS_DIR}/var/lib/systemd/rfkill/platform-3f300000.mmcnr:wlan"
     echo 0 > "${ROOTFS_DIR}/var/lib/systemd/rfkill/platform-fe300000.mmcnr:wlan"
 else