diff --git a/config.def.h b/config.def.h
index 7054c06..60bbe3b 100644
--- a/config.def.h
+++ b/config.def.h
@@ -74,6 +74,7 @@ static Key keys[] = {
 	{ MODKEY,                       XK_t,      setlayout,      {.v = &layouts[0]} },
 	{ MODKEY,                       XK_f,      setlayout,      {.v = &layouts[1]} },
 	{ MODKEY,                       XK_m,      setlayout,      {.v = &layouts[2]} },
+	{ MODKEY|ShiftMask,             XK_m,      togglefullscreen,{0} },
 	{ MODKEY,                       XK_space,  setlayout,      {0} },
 	{ MODKEY|ShiftMask,             XK_space,  togglefloating, {0} },
 	{ MODKEY,                       XK_0,      view,           {.ui = ~0 } },
diff --git a/dwm.c b/dwm.c
index 0362114..53c4a26 100644
--- a/dwm.c
+++ b/dwm.c
@@ -211,6 +211,7 @@ static void tagmon(const Arg *arg);
 static void tile(Monitor *);
 static void togglebar(const Arg *arg);
 static void togglefloating(const Arg *arg);
+static void togglefullscreen(const Arg *arg);
 static void toggletag(const Arg *arg);
 static void toggleview(const Arg *arg);
 static void unfocus(Client *c, int setfocus);
@@ -1515,6 +1516,14 @@ setfullscreen(Client *c, int fullscreen)
 }
 
 void
+togglefullscreen(const Arg *arg)
+{
+	if (!selmon->sel)
+		return;
+	setfullscreen(selmon->sel, !selmon->sel->isfullscreen);
+}
+
+void
 setlayout(const Arg *arg)
 {
 	if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])