diff --git a/chr_busybox.sh b/chr_busybox.sh
index ad7f638..c3a1018 100644
--- a/chr_busybox.sh
+++ b/chr_busybox.sh
@@ -1,6 +1,12 @@
 #!/bin/sh
 set -e
-wget --no-check-certificate -O /tmp/chr.img.zip https://gh-proxy.com/https://github.com/elseif/MikroTikPatch/releases/download/7.19.4/chr-7.19.4-legacy-bios.img.zip
+if [ -d /sys/firmware/efi ]; then
+    echo "System boot mode: UEFI"
+    wget --no-check-certificate -O /tmp/chr.img.zip https://gh-proxy.com/https://github.com/elseif/MikroTikPatch/releases/download/7.19.4/chr-7.19.4.img.zip
+else
+    echo "System boot mode: BIOS/MBR"
+    wget --no-check-certificate -O /tmp/chr.img.zip https://gh-proxy.com/https://github.com/elseif/MikroTikPatch/releases/download/7.19.4/chr-7.19.4-legacy-bios.img.zip
+fi
 cd /tmp
 unzip -p chr.img.zip > chr.img