diff --git a/docs/image-setup.sh b/docs/image-setup.sh
index bc5194f..ea2212c 100755
--- a/docs/image-setup.sh
+++ b/docs/image-setup.sh
@@ -265,7 +265,7 @@ read
 
 working "Making boot quieter (part 1)" # https://scribles.net/customizing-boot-up-screen-on-raspberry-pi/
 echo "Updating: $BOOT_CONFIG_TXT"
-perl -i -p0e "s/#disable_overscan=1/disable_overscan=1/g" "$BOOT_CONFIG_TXT"
+perl -i -p0e "s/#disable_overscan=1/disable_overscan=1/g" "$BOOT_CONFIG_TXT" # "perl" is more cross-platform than "sed -i"
 echo -e "\ndisable_splash=1" >> "$BOOT_CONFIG_TXT"
 
 working "Making boot quieter (part 2)" # https://scribles.net/customizing-boot-up-screen-on-raspberry-pi/