diff --git a/builder/stage4/04-pisdr-system/01-run.sh b/builder/stage4/04-pisdr-system/01-run.sh
index a4e9070..6221a3d 100755
--- a/builder/stage4/04-pisdr-system/01-run.sh
+++ b/builder/stage4/04-pisdr-system/01-run.sh
@@ -5,6 +5,5 @@ install -m 755 shortcut/sdrangel.desktop "${ROOTFS_DIR}/home/${FIRST_USER_NAME}/
 install -m 755 wallpaper/donald-giannatti-vla.jpg "${ROOTFS_DIR}/usr/share/rpd-wallpaper/"
 
 on_chroot << EOF
-export DISPLAY=:0.0
-pcmanfm --set-wallpaper ${ROOTFS_DIR}/usr/share/rpd-wallpaper/donald-giannatti-vla.jpg
+env DISPLAY=:0.0 pcmanfm --set-wallpaper ${ROOTFS_DIR}/usr/share/rpd-wallpaper/donald-giannatti-vla.jpg
 EOF
\ No newline at end of file