diff --git a/doc/board/kontron/sl-mx8mm.rst b/doc/board/kontron/sl-mx8mm.rst
index 8b29cbba67b..702db60fe38 100644
--- a/doc/board/kontron/sl-mx8mm.rst
+++ b/doc/board/kontron/sl-mx8mm.rst
@@ -81,9 +81,9 @@ Build U-Boot
 .. code-block:: bash
 
    $ make kontron-sl-mx8mm_defconfig
-   $ make
+   $ make CROSS_COMPILE=aarch64-linux-gnu-
 
-Burn the flash.bin to SD card at an offset of 33 KiB:
+Copy the flash.bin to SD card at an offset of 33 KiB:
 
 .. code-block:: bash