diff --git a/labs/yocto-first-build-stm32/yocto-first-build-stm32.tex b/labs/yocto-first-build-stm32/yocto-first-build-stm32.tex
index d959a1a82f..86453532cd 100644
--- a/labs/yocto-first-build-stm32/yocto-first-build-stm32.tex
+++ b/labs/yocto-first-build-stm32/yocto-first-build-stm32.tex
@@ -98,7 +98,7 @@ \section{Set up the SD card}
 Flash the SD card with that image:
 \begin{bashinput}
 umount /dev/mmcblk0p*
-sudo dd if=../FlashLayout_sdcard_stm32mp157d-dk1-extensible.raw of=/dev/sdc bs=8M conv=fdatasync status=progress
+sudo dd if=../FlashLayout_sdcard_stm32mp157d-dk1-extensible.raw of=/dev/mmcblk0 bs=8M conv=fdatasync status=progress
 \end{bashinput}
 
 \section{Setting up serial communication with the board}