diff -up a/slock.c b/slock.c
--- a/slock.c
+++ b/slock.c
@@ -18,6 +18,7 @@
 #include <X11/extensions/Xrandr.h>
 #include <X11/extensions/dpms.h>
 #include <X11/keysym.h>
+#include <X11/XF86keysym.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 
@@ -180,6 +181,21 @@ readpw(Display *dpy, struct xrandr *rr,
 				explicit_bzero(&passwd, sizeof(passwd));
 				len = 0;
 				break;
+			case XF86XK_AudioRaiseVolume:
+				XSendEvent(dpy, DefaultRootWindow(dpy), True, KeyPressMask, &ev);
+				break;
+			case XF86XK_AudioLowerVolume:
+				XSendEvent(dpy, DefaultRootWindow(dpy), True, KeyPressMask, &ev);
+				break;
+			case XF86XK_AudioMute:
+				XSendEvent(dpy, DefaultRootWindow(dpy), True, KeyPressMask, &ev);
+				break;
+			case XF86XK_MonBrightnessUp:
+				XSendEvent(dpy, DefaultRootWindow(dpy), True, KeyPressMask, &ev);
+				break;
+			case XF86XK_MonBrightnessDown:
+				XSendEvent(dpy, DefaultRootWindow(dpy), True, KeyPressMask, &ev);
+				break;
 			case XK_BackSpace:
 				if (len)
 					passwd[len--] = '\0';