diff --git a/lightdm.be0 b/lightdm.be0
index bb7dd050a..a044b504b 100755
--- a/lightdm.be0
+++ b/lightdm.be0
@@ -89,6 +89,7 @@ EOF
 	ExecStart=/usr/bin/lightdm
 	StandardOutput=syslog
 	Restart=always
+	UMask=007
 
 	[Install]
 	WantedBy=graphical.target