diff --git a/bootstrap.d/41-uboot.sh b/bootstrap.d/41-uboot.sh
index 67c4657..940d317 100644
--- a/bootstrap.d/41-uboot.sh
+++ b/bootstrap.d/41-uboot.sh
@@ -65,6 +65,16 @@ if [ "$ENABLE_UBOOT" = true ] ; then
       printf "\nbootz \${kernel_addr_r} - \${fdt_addr_r}" >> "${BOOT_DIR}/uboot.mkimage"
     fi
   fi
+  
+  if [ "$KERNEL_ARCH" = "arm64" ] ; then
+    echo "Setting up config.txt to boot 64bit uboot"
+
+    printf "\n# 64bit-mode" >> "${BOOT_DIR}/config.txt"
+    printf "\n# arm_control=0x200 is deprecated https://www.raspberrypi.org/documentation/configuration/config-txt/misc.md" >> "${BOOT_DIR}/config.txt"
+    printf "\narm_64bit=1" >> "${BOOT_DIR}/config.txt"
+	#in 64bit uboot booti is used instead of bootz [like in KERNEL_BIN_IMAGE=zImage (armv7)|| Image(armv8)]
+    sed -i "s|bootz|booti|g" "${BOOT_DIR}/uboot.mkimage"
+  fi
 
   # Set mkfile to use the correct dtb file
   sed -i "s/^\(setenv dtbfile \).*/\1${DTB_FILE}/" "${BOOT_DIR}/uboot.mkimage"