diff -ura xdg-utils-1.1.1/scripts/xdg-screensaver.in xdg-utils-1.1.1.new/scripts/xdg-screensaver.in
--- xdg-utils-1.1.1/scripts/xdg-screensaver.in	2015-10-05 21:59:19.000000000 +0300
+++ xdg-utils-1.1.1.new/scripts/xdg-screensaver.in	2017-05-09 06:03:28.554966637 +0300
@@ -102,6 +102,10 @@
       screensaver_mate_screensaver "$1"
       ;;
 
+    slock_screensaver)
+      screensaver_slock "$1"
+      ;;
+
     xscreensaver)
       screensaver_xscreensaver "$1"
       ;;
@@ -372,6 +376,21 @@
     esac
 }
 
+screensaver_slock()
+{
+    case "$1" in
+        lock)
+        slock > /dev/null
+        result=$?
+        ;;
+
+        *)
+        echo "ERROR: Unknown command '$1'" >&2
+        return 1
+        ;;
+    esac
+}
+
 screensaver_xserver()
 {
     case "$1" in
@@ -790,6 +809,8 @@
 dbus-send --print-reply --dest=org.freedesktop.DBus /org/freedesktop/DBus org.freedesktop.DBus.GetNameOwner string:org.mate.ScreenSaver > /dev/null 2>&1 && DE="mate_screensaver"
 # Consider "xautolock" a separate DE
 xautolock -enable > /dev/null 2>&1 && DE="xautolock_screensaver"
+# Consider "slock" a separate DE
+slock -v > /dev/null 2>&1 && DE="slock_screensaver"
 
 if [ "$action" = "resume" ] ; then
     do_resume