diff --git a/scripts/deviceprofiles/sxmo_deviceprofile_librem5r4purism.sh b/scripts/deviceprofiles/sxmo_deviceprofile_librem5r4purism.sh
index 280c3fb..5cb86e3 100644
--- a/scripts/deviceprofiles/sxmo_deviceprofile_librem5r4purism.sh
+++ b/scripts/deviceprofiles/sxmo_deviceprofile_librem5r4purism.sh
@@ -3,3 +3,4 @@
 export SPEAKER="Speaker"
 export HEADPHONE="Headphone"
 export EARPIECE="Earpiece"
+export BACKLIGHT="/sys/devices/platform/backlight-dsi/backlight/backlight-dsi"