diff --git a/slideshow.service b/slideshow.service
index 62e739d..8ce6196 100644
--- a/slideshow.service
+++ b/slideshow.service
@@ -9,6 +9,7 @@ Environment="SLIDESHOW_INTERVAL=60"
 Environment="SLIDESHOW_DIRECTORY=$HOME"
 Environment="SLIDESHOW_RESOLUTION=1920x1080"
 Environment="SLIDESHOW_LOGLEVEL=info"
+Environment="SLIDESHOW_PALETTE=/tmp/.slideshow.palette"
 ExecStart=/opt/slideshow/slideshow
 
 [Install]