diff --git scripts/xflock4 scripts/xflock4
index ec4d05d..f9846ce 100644
--- scripts/xflock4
+++ scripts/xflock4
@@ -24,6 +24,12 @@
 PATH=/bin:/usr/bin
 export PATH
 
+# Lock by user specified screen lock application
+lock_cmd=$(xfconf-query -c xfce4-session -p /screenlock/command 2>/dev/null)
+if [ $? -a ! -z $lock_cmd ]; then
+    $lock_cmd >/dev/null 2>&1 && exit
+fi
+
 # Lock by xscreensaver or gnome-screensaver, if a respective daemon is running
 for lock_cmd in \
     "xscreensaver-command -lock" \