diff --git a/src/boot.sh b/src/boot.sh
index dadf7ef..1b1fd07 100644
--- a/src/boot.sh
+++ b/src/boot.sh
@@ -3,7 +3,6 @@ set -Eeuo pipefail
 
 # Docker environment variables
 : "${BIOS:=""}"                 # Bios file
-: "${BOOT_MODE:="legacy"}"  # Boot mode
 
 SECURE="off"
 BOOT_OPTS=""