diff --git a/config.def.h b/config.def.h
index 1b31938..c9e54e3 100644
--- a/config.def.h
+++ b/config.def.h
@@ -154,6 +154,10 @@ static const Key keys[] = {
 	TAGKEYS(                        XK_9,                      8)
 	{ ControlMask|Mod1Mask,         XK_r,      quit,           {0} },
 	{ ControlMask|Mod1Mask,         XK_Delete, spawn,          SHCMD("pkill xinit") },
+	{ MODKEY,                       XK_F9,     spawn,          SHCMD("sys-volume toggle") },
+	{ MODKEY,                       XK_F10,    spawn,          SHCMD("sys-volume 5%-") },
+	{ MODKEY,                       XK_F11,    spawn,          SHCMD("sys-volume 5%+") },
+	{ MODKEY,                       XK_F12,    spawn,          SHCMD("sys-lock") },
 };
 
 /* button definitions */