diff --git a/lisp/sawfish/wm/prg/compton.jl b/lisp/sawfish/wm/prg/compton.jl
index 5ffa4dcee..bb3dca2f7 100644
--- a/lisp/sawfish/wm/prg/compton.jl
+++ b/lisp/sawfish/wm/prg/compton.jl
@@ -27,6 +27,7 @@
           rep.io.processes
           rep.io.timers
           rep.util.misc
+	  rep.regexp
           sawfish.wm.misc
           sawfish.wm.custom
           sawfish.wm.windows
@@ -244,6 +245,11 @@
       :type (number 0 100 85 1)
       :after-set (lambda () (update-opacity 'notify)))
 
+    (defcustom compton-extra-args "" "Extra arguments to compton."
+      :depends opacity-enable
+      :group (appearance window-effects)
+      :type string)
+
     ;; windows custom-settings entry
     (define-match-window-property 'opacity 'appearance '(number 0 100 100))
     (define-match-window-property 'no-shadows 'appearance 'boolean)
@@ -282,12 +288,13 @@
       (when (program-exists-p "compton")
         (stop-compton)
         (setq %compton-proc (make-process))
-        (start-process %compton-proc "compton" (format nil "%s" c-shadows) (format nil "%s" c-fade) (format nil "%s" c-avoid) (format nil "%s" c-zero)
+        (apply start-process %compton-proc "compton" (format nil "%s" c-shadows) (format nil "%s" c-fade) (format nil "%s" c-avoid) (format nil "%s" c-zero)
                        "-r" (number->string blur-radius) "-o" (format nil "%s" c-trans) "-l" (number->string left-offset)
                        "-t" (number->string top-offset) "-I" (format nil "%s" c-fade-i) "-O" (format nil "%s" c-fade-o) "-D" (number->string fade-time)
                        "-m" (format nil "%s" c-menu-o) "--shadow-red" (format nil "%s" c-red) "--shadow-green" (format nil "%s" c-green)
                        "--shadow-blue" (format nil "%s" c-blue) (format nil "%s" c-dad) "--detect-rounded-corners" "--shadow-exclude" (concat c-smenu)
-		       "--shadow-exclude" "_COMPTON_SHADOW:32c = 0")))
+		       "--shadow-exclude" "_COMPTON_SHADOW:32c = 0"
+		       (unless (= (length compton-extra-args) 0) (string-split "\\s+" compton-extra-args)))))
 
     (define (stop-compton)
       "Stop compton, if running."