diff --git a/upstart-jobs/xserver.nix b/upstart-jobs/xserver.nix
index 58e8e434ddd9..9b815ede5b86 100644
--- a/upstart-jobs/xserver.nix
+++ b/upstart-jobs/xserver.nix
@@ -414,6 +414,8 @@ rec {
        }
 
       rm -f /var/log/slim.log
+
+      rm -f /tmp/.X0-lock
        
     end script